Samsung Galaxy S25 Ultra VS Vivo X300 Pro

Both phones share a non-folding, non-rugged form factor and are rated waterproof, but the protection standards diverge in a meaningful way. The Vivo X300 Pro carries an IP69 rating, which goes beyond the IP68 of the Samsung Galaxy S25 Ultra by adding resistance to high-pressure, high-temperature water jets — a real-world edge for users who might rinse their phone under a strong tap or encounter harsh outdoor conditions. For most everyday scenarios the difference is minor, but IP69 is objectively the higher standard.

In terms of physical dimensions, the two devices tell an interesting story. The X300 Pro is measurably more compact — narrower at 75.5 mm versus 77.6 mm, shorter, thinner at 8 mm versus 8.2 mm, and packs a noticeably smaller overall volume of 97.36 cm³ compared to 103.59 cm³. That smaller footprint translates to a slightly easier one-handed grip. However, the S25 Ultra counters with a lower weight of 218 g against the X300 Pro's 226 g — an 8-gram difference that, while modest on paper, can be perceptible during extended use.

Overall, neither phone has a sweeping design advantage, but the verdict splits by priority: the X300 Pro wins on compactness and water protection rating, while the S25 Ultra is the lighter device. Users who prioritize one-handed comfort and a higher IP standard will lean toward the X300 Pro; those more sensitive to raw weight will prefer the S25 Ultra.

The Samsung Galaxy S25 Ultra takes a clear lead in raw screen real estate and sharpness. Its 6.9″ panel renders at 1440 x 3120 px with a pixel density of 498 ppi, versus the Vivo X300 Pro's 6.78″ screen at 1260 x 2800 px and 452 ppi. In practice, the S25 Ultra's higher pixel density means text edges appear crisper and fine detail in photos or video is more distinct — a meaningful difference for users who consume a lot of content or read frequently on their phone.

Where the X300 Pro punches back is in display quality metrics. Its contrast ratio of 8,000,000:1 dwarfs the S25 Ultra's already-impressive 3,000,000:1, which translates to deeper perceived blacks and more dramatic HDR highlights in real-world viewing. The X300 Pro also adds Dolby Vision support — absent on the S25 Ultra — giving it an edge for streaming platforms that serve Dolby Vision content. Meanwhile, the X300 Pro's touch sampling rate of 300Hz versus the S25 Ultra's 240Hz offers a marginally more responsive feel during fast interactions like gaming, though the difference is subtle in everyday use.

The verdict here is genuinely split by use case. The S25 Ultra is the stronger choice for users who prioritize screen size and pixel-level sharpness, while the X300 Pro holds the advantage in contrast depth, Dolby Vision compatibility, and touch responsiveness. For cinematic content consumption, the X300 Pro's display characteristics are arguably more compelling; for general productivity and readability, the S25 Ultra's larger, denser panel wins out.

Across every CPU-focused benchmark, the Vivo X300 Pro and its MediaTek Dimensity 9500 chip post notably higher numbers than the Samsung Galaxy S25 Ultra's Snapdragon 8 Elite. The X300 Pro scores 3,015,900 on AnTuTu versus 2,207,809 for the S25 Ultra — a gap of roughly 37% — and leads in both Geekbench 6 single-core (3,781 vs 3,057) and multi-core (12,189 vs 9,846) results. Combined with 16 GB of RAM against the S25 Ultra's 12 GB and a larger 16 MB L3 cache versus 8 MB, the X300 Pro is positioned to handle heavier multitasking loads and sustained workloads with more headroom.

The GPU picture is more nuanced. The X300 Pro's Mali G1 Ultra runs at a higher clock speed of 1,750 MHz compared to the Adreno 830's 1,200 MHz, but the S25 Ultra's GPU carries a dramatically higher shading unit count of 1,536 versus just 128 on the X300 Pro. This divergence reflects fundamentally different GPU architectures rather than a straightforward win for either side, and raw shading unit counts cannot be compared directly across GPU families. Both chips share the same 3 nm manufacturing process and virtually identical memory bandwidth (~85 GB/s), so neither holds a thermal efficiency or data throughput advantage there.

On balance, the X300 Pro holds a clear edge in measured CPU performance and memory capacity, making it the stronger pick for users who stress their device with demanding applications or heavy multitasking. The GPU comparison is too architecturally distinct to call definitively from these specs alone. Storage parity at 1 TB means neither phone has an advantage there.

The telephoto battle is where these two systems diverge most clearly. The Samsung Galaxy S25 Ultra fields four rear cameras with a dedicated 5x optical zoom and a maximum focal length of 111 mm, while the Vivo X300 Pro covers three lenses and tops out at 3.7x optical zoom and 85 mm. For users who frequently shoot distant subjects — wildlife, sports, or stage performances — the S25 Ultra's longer reach is a tangible, real-world advantage. On the opposite end, the X300 Pro pushes wider with a 15 mm minimum focal length versus the S25 Ultra's 24 mm, giving it a broader field of view for architecture, landscapes, and tight indoor spaces where you simply cannot step back further.

Selfie shooters will find a striking gap: the X300 Pro packs a 50 MP front camera compared to the S25 Ultra's 12 MP, and its front aperture is a slightly faster f/2.0 versus f/2.2. That resolution advantage means significantly more detail and cropping flexibility in self-portraits. On the rear system, the S25 Ultra includes a BSI sensor — which improves light capture efficiency — while the X300 Pro does not list one. The S25 Ultra also supports HDR10 video recording and manual shutter speed control, two omissions on the X300 Pro that matter to more serious video creators and manual shooters.

Neither phone has a clean sweep here — the outcome depends entirely on shooting priorities. The S25 Ultra is the stronger all-rounder for telephoto reach, video fidelity, and manual control, while the X300 Pro wins decisively on ultrawide coverage and front-camera resolution. Users who shoot a lot of selfies or wide environmental shots will gravitate toward the X300 Pro; those who value zoom versatility and video capability will find the S25 Ultra more compelling.

The most immediate differentiator is Android version: the Vivo X300 Pro ships with Android 16, while the Samsung Galaxy S25 Ultra launches on Android 15. Running a newer OS version at launch means the X300 Pro starts with the latest platform-level security patches, privacy APIs, and system behaviors — a meaningful head start, even if Samsung's update cadence may eventually close that gap for the S25 Ultra.

Beyond the version number, the feature differences are selective but worth noting. The S25 Ultra includes cross-site tracking protection, Wi-Fi password sharing, focus modes, and the ability to be used as a PC — none of which the X300 Pro lists. The PC mode capability in particular is a notable productivity feature, allowing the phone to power a desktop-like interface when connected to a display. The X300 Pro, for its part, misses these but the two phones otherwise share a remarkably similar software feature set across privacy controls, multitasking, customization, and accessibility tools.

On balance, the S25 Ultra holds a practical software advantage through its broader feature set — especially PC mode and focus modes for productivity-oriented users — while the X300 Pro's edge is simply being on a newer OS version at launch. Neither device receives direct OS updates per the specs, so long-term software support is equal on that measure. Users who value a richer out-of-the-box feature toolkit will lean toward the S25 Ultra; those who prefer the latest Android foundation from day one will prefer the X300 Pro.

The Vivo X300 Pro holds a commanding lead in battery capacity, packing a 6,510 mAh cell against the Samsung Galaxy S25 Ultra's 5,000 mAh. That 30% difference in raw capacity is substantial — all else being equal, it translates directly into meaningfully longer time between charges, which matters most for heavy users, travelers, or anyone regularly pushing through a full day of demanding usage. The S25 Ultra's 5,000 mAh is a respectable figure for a flagship, but the X300 Pro simply has more fuel in the tank.

Charging speed compounds the X300 Pro's advantage further. Its 90W wired charging is double the S25 Ultra's 45W, meaning the X300 Pro can replenish its larger battery in significantly less time. The wireless charging gap is even wider: 40W on the X300 Pro versus 15W on the S25 Ultra — a difference that makes wireless top-ups far more practical on the Vivo. Both phones support reverse wireless charging, so neither has an edge there. One small but practical bonus: the X300 Pro comes with a charger in the box, while the S25 Ultra does not.

This category is a clear win for the X300 Pro across every meaningful dimension — larger capacity, faster wired charging, faster wireless charging, and a bundled charger. For any user who treats battery life and charging convenience as priorities, the X300 Pro's advantage here is difficult to overlook.

Audio is one of the closer categories in this comparison, with both phones sharing stereo speakers, no 3.5 mm headphone jack, and support for aptX and aptX HD. The one meaningful differentiator is that the Samsung Galaxy S25 Ultra adds LDAC support, which the Vivo X300 Pro lacks. LDAC is Sony's high-resolution Bluetooth codec, capable of transmitting up to three times the data of standard SBC — for users with LDAC-compatible wireless headphones, this translates to noticeably higher audio fidelity over Bluetooth.

Neither phone supports aptX Adaptive, aptX Lossless, or a built-in radio, so the gap between them is narrow. The absence of a headphone jack on both devices means wired listening requires an adapter on either phone, and Bluetooth codec quality becomes the primary lever for audiophiles. In that context, LDAC support is the single most impactful spec in this group for users who invest in premium wireless audio gear.

The S25 Ultra takes a slim but clear edge here, solely on the strength of LDAC. For casual listeners, the two phones are essentially equivalent. For anyone pairing their device with high-end Sony, Sennheiser, or other LDAC-certified headphones, the S25 Ultra is the more capable choice in this category.

Wireless connectivity is where both phones carve out distinct advantages. The Vivo X300 Pro runs Bluetooth 6.0 against the Samsung Galaxy S25 Ultra's Bluetooth 5.4 — a newer version that brings improved connection stability and lower latency, particularly relevant for wireless audio and peripheral use. The X300 Pro also edges ahead on raw 5G download speed (10,700 Mbits/s vs 10,000 Mbits/s), though this difference is marginal in real-world conditions. The S25 Ultra counters with Wi-Fi 6E support, which the X300 Pro lacks — giving it access to the less-congested 6 GHz band for faster, more reliable connections in dense environments like offices or apartments.

The feature set diverges in ways that speak to very different user profiles. The S25 Ultra ships with a built-in stylus, a barometer for altitude and weather sensing, and dual eSIM support alongside its two physical SIM slots — making it a more versatile choice for frequent travelers and power users. The X300 Pro answers with emergency SOS via satellite — a potentially life-saving capability the S25 Ultra lacks — and an infrared sensor that lets it function as a universal remote control for TVs and appliances.

Neither phone dominates outright, but the split is meaningful. The S25 Ultra is the richer connectivity package for productivity and travel, with Wi-Fi 6E, dual eSIM, a stylus, and ANT+ sensor support. The X300 Pro's satellite SOS is a standout safety feature that carries outsized importance in emergencies, and its newer Bluetooth version is a quiet but consistent advantage. Users prioritizing safety and smart-home control will value the X300 Pro's extras; those seeking maximum flexibility for work and travel will find the S25 Ultra's feature breadth more compelling.

The Miscellaneous group offers no differentiation between the two devices whatsoever. The Samsung Galaxy S25 Ultra and the Vivo X300 Pro share an identical profile across every spec listed here: both include a video light, and neither features a sapphire glass display, a curved display, or an e-paper display.

This is a complete tie by the data provided. Neither phone holds any advantage in this category, and it should carry no weight in a purchasing decision between the two.