Vivo X300 Pro VS ZTE Nubia Z80 Ultra

Both the Vivo X300 Pro and the ZTE Nubia Z80 Ultra are solidly built, non-foldable smartphones with waterproof ratings, and their weights are virtually identical at 226 g and 227 g respectively — a difference so small it is imperceptible in daily use. Where they begin to diverge is in their physical footprint: the X300 Pro is measurably more compact, being 0.6 mm thinner, 1.7 mm narrower, and 3.3 mm shorter, which translates into a total volume of 97.4 cm³ versus the Z80 Ultra's 109.2 cm³. That roughly 12% difference in volume is meaningful — the X300 Pro will feel noticeably easier to grip one-handed and will slip more comfortably into a pocket.

The more consequential distinction lies in water resistance. Both phones are rated to 1.5 m depth submersion, but the X300 Pro carries an IP69 certification while the Z80 Ultra holds IP68. IP69 adds protection against high-pressure, high-temperature water jets — a scenario IP68 does not cover. In everyday terms, this means the X300 Pro can better withstand being rinsed under a forceful tap or caught in heavy rain, whereas IP68 is sufficient for accidental submersion in still water.

Overall, the Vivo X300 Pro holds a clear edge in this category. Its more compact form factor improves ergonomics without any weight penalty, and its superior IP69 rating offers a broader spectrum of water protection than the Z80 Ultra's IP68 — making it the stronger choice for users who prioritize both handling comfort and durability.

Both screens are OLED/AMOLED panels with Always-On Display support and identical HDR credentials — HDR10 and HDR10+ on each. The meaningful splits emerge when you look closer. The X300 Pro pairs a 6.78″ panel with a 452 ppi pixel density, while the Z80 Ultra's slightly larger 6.85″ screen resolves to 431 ppi — a 21 ppi gap that makes the X300 Pro's display perceptibly sharper, particularly when reading fine text or viewing detailed imagery up close.

On refresh rate, the dynamic flips: the Z80 Ultra runs at 144Hz versus the X300 Pro's 120Hz, meaning scrolling and animations will appear marginally smoother on the Nubia — an advantage most noticeable in fast-paced gaming or rapid UI navigation. The X300 Pro counters with Dolby Vision support, which the Z80 Ultra lacks entirely. Dolby Vision applies dynamic, scene-by-scene tone mapping that goes beyond what HDR10+ offers statically, resulting in more accurate highlights and colors when streaming compatible content from platforms like Netflix or Apple TV+.

This category is genuinely split by use case. Gamers and users who prioritize fluid motion will lean toward the Z80 Ultra's 144Hz panel, while those who consume a lot of premium streaming content or demand maximum sharpness will find the Vivo X300 Pro — with its higher pixel density and Dolby Vision certification — the more compelling display overall. On balance, Dolby Vision is the rarer and arguably more impactful differentiator, giving the X300 Pro a slight edge for multimedia use.

At the memory and storage level, these two phones are essentially identical — both ship with 16 GB of DDR5 RAM, 1 TB of internal storage, near-identical memory bandwidth (~85 GB/s), and a maximum expandable RAM ceiling of 24 GB. The real competition happens at the silicon level, where the X300 Pro's MediaTek Dimensity 9500 and the Z80 Ultra's Qualcomm Snapdragon 8 Elite Gen 5 take very different architectural approaches despite sharing the same 3 nm process node.

In CPU performance, the Dimensity 9500 is the clear winner by a significant margin: the X300 Pro scores 12,189 (multi-core) and 3,781 (single-core) on Geekbench 6, versus the Z80 Ultra's 10,059 and 3,234 respectively — leads of roughly 21% and 17%. The X300 Pro also doubles the Z80 Ultra on L3 cache (16 MB vs 8 MB), which reduces memory latency during demanding, sustained workloads like video editing or large app loading. GPU shading units tell a starkly different story: the Adreno 830 in the Z80 Ultra carries 1,536 shading units compared to just 128 in the Mali G1 Ultra, though the Mali compensates with a much higher GPU clock of 1,750 MHz versus 1,200 MHz. Raw shading unit count and clock speed affect performance differently depending on workload architecture, so these figures alone cannot determine a GPU winner.

On aggregate, the Vivo X300 Pro holds a decisive advantage in CPU throughput — the benchmark gap is too wide to dismiss — and its larger L3 cache reinforces that edge for everyday performance. Users whose priority is raw processing speed and app responsiveness will find the X300 Pro the stronger performer based strictly on the provided data.

The headline gap in this category is the primary sensor: the X300 Pro fields a 200 MP main shooter against the Z80 Ultra's 64 MP. That three-fold resolution advantage gives the X300 Pro substantially more detail headroom for cropping, large-format printing, or pixel-binning down to cleaner lower-resolution outputs. The secondary and tertiary lenses are matched at 50 MP on both phones, but the X300 Pro's wider focal range — 15 mm to 85 mm versus the Z80 Ultra's 18 mm to 70 mm — means it can capture a broader wide-angle perspective and reach further at the telephoto end, reinforced by a stronger 3.7x optical zoom versus 2.7x. For users who shoot in varied environments, that extra versatility is tangible.

Aperture dynamics add a nuance worth noting. The Z80 Ultra's primary lens opens to f/2.4 compared to the X300 Pro's f/2.7, meaning it admits more light at the main sensor — a small but real advantage in low-light photography with that specific lens. However, the X300 Pro's secondary lens is wider at f/1.6 versus the Z80 Ultra's f/1.7, partially offsetting this. The selfie camera split is unambiguous: the X300 Pro's 50 MP front sensor triples the Z80 Ultra's 16 MP, a significant advantage for portrait selfies and video calls. The Z80 Ultra responds with HDR10 video recording support, which the X300 Pro lacks — a meaningful differentiator for users who prioritize high-dynamic-range footage.

Taken as a whole, the Vivo X300 Pro holds a clear edge in this category. Its dominant primary resolution, superior optical zoom reach, wider focal range, and far higher-resolution front camera represent more impactful advantages than the Z80 Ultra's marginally wider primary aperture and HDR10 recording support. Photographers and selfie-focused users will find the X300 Pro the more capable imaging system based strictly on the provided specs.

This is a rare category where the data leaves nothing to debate: every single operating system specification is identical across both phones. Both run Android 16, the same version, with the exact same feature set checked off across privacy controls, multitasking capabilities, customization options, and accessibility tools.

The shared foundation is nonetheless worth contextualizing. Running Android 16 means both devices benefit from Google's latest privacy architecture — including camera and microphone permission controls, app tracking blocking, and on-device machine learning — without relying on cloud processing for sensitive tasks. Practically useful features like split-screen multitasking, Picture-in-Picture, offline voice recognition, and full-page screenshots are present on both, covering the needs of most power users. Neither phone gets direct OS updates from Google, meaning both depend on their respective manufacturers for software patches — a shared limitation that buyers should factor into long-term ownership decisions.

The verdict here is an unambiguous tie. Based strictly on the provided specifications, no advantage exists for either the Vivo X300 Pro or the ZTE Nubia Z80 Ultra in this category. A buyer's software experience will be shaped more by each manufacturer's custom Android skin and update cadence than by anything separable from these specs alone.

Capacity is where the Z80 Ultra makes its most assertive statement in this comparison: its 7,200 mAh battery outpaces the X300 Pro's already-generous 6,510 mAh by a 690 mAh margin — roughly 10.6% more energy storage. In practical terms, that gap can translate to an additional hour or more of screen-on time during a demanding day, making the Z80 Ultra the stronger choice for heavy users or travelers who cannot top up frequently.

Wired charging speed is identical at 90W on both phones, so refill times from a cable will be comparable. Wireless charging is where the two diverge sharply: the Z80 Ultra supports 80W wireless charging, a figure that rivals many phones' wired speeds and dramatically reduces the friction of cable-free top-ups. The X300 Pro's 40W wireless is respectable but is clearly outpaced here. The X300 Pro does, however, offer reverse wireless charging — the ability to share power with other devices like earbuds or a smartwatch — a feature the Z80 Ultra omits entirely.

Weighing these trade-offs, the ZTE Nubia Z80 Ultra holds the overall battery edge. Its larger capacity and significantly faster wireless charging speed are high-impact advantages for most users, while the X300 Pro's reverse wireless charging, though useful, is a niche convenience that serves fewer daily scenarios. Users who regularly charge wirelessly or prioritize maximum endurance will find the Z80 Ultra the more capable option in this category.

Shared ground dominates this category: neither phone includes a 3.5 mm headphone jack, both deliver stereo speakers for spatial audio output, and both support aptX and aptX HD for high-quality Bluetooth audio streaming. For the majority of wireless listening scenarios, the two phones will perform at the same level.

The single differentiator is the Z80 Ultra's support for aptX Adaptive, which the X300 Pro lacks. aptX Adaptive is a more advanced codec that dynamically adjusts its bitrate — scaling between 276 kbps and 420 kbps (or higher on compatible hardware) — to maintain stable, low-latency, high-resolution audio over Bluetooth even in congested wireless environments. In practice, this means users pairing the Z80 Ultra with aptX Adaptive-compatible headphones will experience more consistent audio quality and reduced latency during activities like gaming or video watching, compared to the fixed-bitrate behavior of aptX HD. It is worth noting that neither phone supports aptX Lossless, so true lossless Bluetooth transmission is off the table for both.

The ZTE Nubia Z80 Ultra takes a narrow but genuine edge here. aptX Adaptive is a forward-looking codec that makes a real difference when paired with the right headphones, and its absence on the X300 Pro is a meaningful gap for audiophiles who invest in premium Bluetooth audio gear. For users who rely on standard wired or non-aptX wireless headphones, however, this distinction will go unnoticed in daily use.

The connectivity foundations of these two phones are remarkably similar — both support 5G, Wi-Fi 7, USB 3.2 Type-C, NFC, dual SIM, and an identical sensor suite including GPS, gyroscope, compass, infrared, and accelerometer. The Z80 Ultra does add Wi-Fi 6E to its stack, which opens access to the less congested 6 GHz band in supported environments, but given that both phones already support Wi-Fi 7 — which also operates on the 6 GHz band — this is largely a redundant addition in practice.

The two most consequential differentiators pull in opposite directions. The X300 Pro runs Bluetooth 6 against the Z80 Ultra's Bluetooth 5.4 — a full generational leap that brings improved connection precision, lower energy consumption, and better multi-device handling. More strikingly, the X300 Pro supports emergency SOS via satellite, a feature entirely absent on the Z80 Ultra. This allows the phone to send distress signals in areas with no cellular coverage — a capability that has moved from niche to essential for users who travel to remote or rural locations. The X300 Pro also posts a marginally higher peak download speed of 10,700 Mbits/s versus 10,000 Mbits/s, though the real-world difference at those figures is negligible.

The Vivo X300 Pro holds a clear advantage in this category. Its newer Bluetooth version is a meaningful upgrade for wireless peripheral users, but it is the satellite SOS capability — a genuine safety feature with no equivalent on the Z80 Ultra — that decisively tips the scales. For anyone who values connectivity resilience beyond urban environments, the X300 Pro is the stronger choice by a notable margin.

The miscellaneous specifications for these two phones are completely identical across every data point provided. Both include a video light, and neither features sapphire glass, a curved display, or an e-paper display — leaving no differentiator to analyze in this group.

This is a straightforward tie. Based strictly on the provided specifications, the Vivo X300 Pro and the ZTE Nubia Z80 Ultra are indistinguishable here, and this category offers no useful signal to inform a purchasing decision between them.