OnePlus Ace 5 Ultra VS OnePlus Ace 6

In terms of footprint, the OnePlus Ace 5 Ultra and OnePlus Ace 6 are virtually identical twins — sharing the exact same 77 mm width and 163.4 mm height, meaning they fit the same in the hand and in a pocket. The differences emerge in the finer physical details: the Ace 5 Ultra is marginally slimmer at 8.1 mm versus 8.3 mm, and lighter at 206 g versus 213 g. While a 7-gram difference is unlikely to be felt during a quick pick-up, it can register during extended one-handed use or long gaming sessions.

The most meaningful design distinction is water protection. The Ace 5 Ultra is rated as water resistant, while the Ace 6 steps up to waterproof. This is not a trivial semantic difference — water resistance typically implies protection against splashes and light rain, whereas waterproof suggests the device can survive brief submersion. For users who use their phone near pools, in rain-heavy environments, or simply want greater peace of mind, this is a tangible real-world advantage for the Ace 6.

Overall, the Ace 6 holds a clear edge in design durability thanks to its superior water protection rating. The Ace 5 Ultra counters with a fractionally slimmer and lighter profile, but those gains are cosmetic rather than functional for most users. Neither device offers a rugged build or a foldable form factor, keeping both squarely in conventional smartphone territory.

Both phones share an identical display foundation — a 6.83″ OLED/AMOLED panel with a 1272 x 2800 px resolution and 450 ppi pixel density — meaning sharpness, color vibrancy, and screen real estate are equivalent out of the box. Branded damage-resistant glass and HDR10 support are also present on both, so the baseline viewing and durability experience is well-matched.

Where the Ace 6 pulls ahead is in the details that define day-to-day smoothness and content quality. Its 165Hz refresh rate versus the Ace 5 Ultra's 120Hz translates to noticeably more fluid scrolling and animations — a difference that gamers and power users will feel immediately. Beyond that, the Ace 6 adds HDR10+ and Dolby Vision support, which enable dynamic metadata for scene-by-scene tone mapping on compatible content, producing richer contrast and more accurate highlights compared to standard HDR10 alone. An Always-On Display rounds out the Ace 6's advantages, allowing glanceable information — time, notifications — without fully waking the screen.

The Ace 6 wins this category decisively. Every differentiating spec here belongs to it: a higher refresh rate, broader HDR format support, and Always-On Display functionality. The Ace 5 Ultra's display is by no means poor, but the Ace 6 offers a meaningfully upgraded visual experience for media consumption and fluid interaction alike.

Both phones are built on 3 nm processors with 16 GB of DDR5 RAM and 1 TB of storage, placing them firmly in flagship territory. The chipset choice, however, tells two different stories. The Ace 5 Ultra runs MediaTek's Dimensity 9400 Plus, while the Ace 6 deploys Qualcomm's Snapdragon 8 Elite — and the Geekbench 6 scores reflect a meaningful gap: the Ace 6 posts 10059 multi-core and 3234 single-core versus 8969 and 2874 on the Ace 5 Ultra. That roughly 12% CPU advantage in both single and multi-threaded tasks translates to snappier app launches, faster processing of complex workloads, and more headroom under sustained load.

The GPU picture is more nuanced. The Ace 5 Ultra's Immortalis G925 runs at a higher clock of 1300 MHz compared to the Ace 6's Adreno 830 at 1100 MHz, but raw clock speed is not directly comparable across different GPU architectures. The Ace 5 Ultra also benefits from a larger 12 MB L3 cache versus 8 MB on the Ace 6, which can reduce latency in cache-sensitive operations. On the memory side, the Ace 5 Ultra's reported RAM speed of 10667 MHz dwarfs the Ace 6's 5300 MHz, though both use DDR5 — a gap that likely reflects different measurement or configuration contexts rather than a straightforward performance doubling. Memory bandwidth is essentially tied at roughly 85 GB/s on both devices.

The Ace 6 holds the performance edge, driven by its clearly superior CPU benchmark scores — the metric most relevant to everyday responsiveness and app performance. The Ace 5 Ultra presents some intriguing counter-specs in GPU clock speed and L3 cache size, and it uniquely lacks ECC memory support (which the Ace 6 offers for improved data integrity). For CPU-bound tasks and general use, the Snapdragon 8 Elite in the Ace 6 is the stronger platform based on the provided data.

Strip away the branding and the two cameras look nearly identical on paper — both shoot 50 & 8 MP on the rear and 16 MP up front, both include OIS, phase-detection autofocus, RAW capture, and a full suite of manual controls. For still photography, users can expect a comparable feature set and shooting flexibility on either device.

Video recording is where the two diverge in opposite directions. The Ace 5 Ultra tops out at 4K 60fps, doubling the Ace 6's maximum of 4K 30fps — a genuine advantage for anyone shooting action footage, sports, or content that benefits from smoother motion capture. The Ace 6 counters with HDR10+ and Dolby Vision recording support, which the Ace 5 Ultra entirely lacks. For creators distributing content to HDR-capable screens or streaming platforms, this means the Ace 6 can capture footage with richer dynamic range metadata baked in — though that benefit is only realized in compatible playback environments. The Ace 5 Ultra also includes a dual-tone LED flash for more natural-looking artificial light in photos, a small but practical edge the Ace 6 does not offer.

This category is a genuine split depending on use case. The Ace 5 Ultra holds the video framerate advantage for smooth motion capture, while the Ace 6 wins on HDR video format support for content-creation workflows. Neither device dominates outright — the right choice hinges on whether high-framerate recording or HDR-graded video output matters more to the user.

Across the entire operating system feature set, these two devices are functionally identical — every privacy control, productivity tool, and customization option listed is shared by both. The one and only differentiator in this category is the Android version: the Ace 5 Ultra ships with Android 15, while the Ace 6 launches on Android 16.

That single version gap carries real-world weight. A newer Android release typically brings security patches, privacy refinements, and platform-level optimizations that older builds do not have at launch. For users who prioritize being on the most current software foundation from day one — particularly from a security standpoint — the Ace 6 starts from a more up-to-date baseline. Neither device receives direct OS updates according to the provided data, so the version each ships with carries added significance as the long-term software foundation.

The Ace 6 holds a clear, if narrow, edge here solely by virtue of launching on a newer Android version. For users who treat software currency as a meaningful factor — especially given neither phone gets direct OS updates — starting one generation ahead on Android 16 is a tangible advantage that the Ace 5 Ultra cannot match in this category.

Battery is one of the most lopsided categories in this comparison. The Ace 6 packs a 7800 mAh cell against the Ace 5 Ultra's already-generous 7000 mAh — an 800 mAh difference that, at these capacity levels, represents a meaningful real-world buffer. Both phones are well above the mainstream flagship average, but the Ace 6's larger reserve translates to extended screen-on time and greater resilience through heavy usage days without reaching for a charger.

Charging tells a similar story in favor of the Ace 6. Its 120W wired charging edges out the Ace 5 Ultra's 100W, meaning a larger battery that also refills faster — a combination that effectively eliminates any practical downside of the bigger cell. More significantly, the Ace 6 adds wireless charging, a feature entirely absent on the Ace 5 Ultra. For users with wireless charging pads at their desk or nightstand, this is a meaningful convenience upgrade that changes daily charging habits.

The Ace 6 wins this category comprehensively. It holds advantages on every differentiating spec — bigger battery, faster wired charging, and exclusive wireless charging support — while both devices share the same sensible baseline of fast charging, a bundled charger, and a non-removable cell. For battery-conscious buyers, the Ace 6 is the clear choice.

Stereo speakers and no headphone jack are shared ground for both devices, so the hardware listening experience from the built-in speakers is equivalent. The real differentiation here lies in Bluetooth audio codec support, which determines the quality ceiling when using wireless headphones.

Both phones support aptX HD, enabling high-resolution wireless audio that surpasses standard Bluetooth quality. Beyond that, the two devices diverge. The Ace 5 Ultra adds basic aptX for broader compatibility with older wireless accessories, but misses out on newer codec generations. The Ace 6 skips standard aptX but gains aptX Adaptive — a more significant upgrade. aptX Adaptive is a next-generation codec that dynamically adjusts bitrate in real time to balance audio quality and latency, making it particularly valuable for both high-fidelity music listening and low-latency use cases like gaming or video. It also future-proofs the device for compatible headphones entering the market.

The Ace 6 holds the audio edge for wireless listening. While the Ace 5 Ultra's standard aptX support covers a wider range of legacy accessories, the Ace 6's aptX Adaptive represents a generational step forward in codec technology — a more meaningful capability than backward compatibility with older aptX devices. Users invested in premium wireless audio hardware will find the Ace 6 the stronger platform.

Connectivity parity runs deep between these two devices. Both carry Wi-Fi 7, Bluetooth 5.4, 5G, NFC, dual SIM, USB Type-C, and an infrared sensor — a comprehensive and modern feature set that leaves little to complain about on either side. The sensor suite, navigation support, and biometric options are likewise identical, making the vast majority of this category a straight draw.

The one meaningful differentiator is cellular download speed. The Ace 6 supports up to 10,000 Mbits/s, compared to 7,300 Mbits/s on the Ace 5 Ultra — a roughly 37% higher peak throughput. In practice, real-world 5G speeds are dictated by network conditions and rarely approach either ceiling, but the higher spec indicates a more advanced modem that can better exploit dense 5G infrastructure and deliver more headroom as networks improve. For users in areas with mature 5G rollout, this gap can translate to faster large file downloads and more stable high-bandwidth streaming. It is also worth noting that both devices share the same USB 2.0 standard on their Type-C port, which limits wired data transfer speeds regardless of the modem advantage.

The Ace 6 edges ahead in this category, but narrowly. Its superior download speed is the sole differentiator in an otherwise perfectly matched connectivity profile, and its real-world impact depends heavily on local network quality. For most users, the two phones will feel functionally identical in day-to-day connectivity.

The miscellaneous category offers no basis for differentiation whatsoever — every spec listed here is identical across the OnePlus Ace 5 Ultra and OnePlus Ace 6. Both include a video light, and neither features sapphire glass, a curved display, or an e-paper display.

This is a complete tie. With only four data points and zero divergence between them, this group has no bearing on a purchase decision either way.