OnePlus Ace 5 Ultra VS Samsung Galaxy S25 Ultra

In terms of physical footprint, the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra are remarkably close. Both share the same 77 mm width and sit within a millimeter of each other in height and thickness, making them essentially indistinguishable in hand from a size perspective. Neither offers a rugged build or a foldable form factor, so both target the same premium candy-bar segment.

Where differences do emerge is in weight and water protection. The OnePlus Ace 5 Ultra comes in at 206 g versus the Galaxy S25 Ultra's 218 g — a 12-gram gap that, while not dramatic on paper, can be noticeable during extended one-handed use or long calls. More significantly, the S25 Ultra is rated Waterproof while the Ace 5 Ultra is only Water resistant. In practice, this distinction often maps to a higher IP rating on the Samsung — meaning it can withstand submersion at greater depths or for longer durations, not just splashes and rain exposure.

Overall, the Samsung Galaxy S25 Ultra holds a clear edge in this group. Its superior water protection is a meaningful real-world advantage for users who want peace of mind near pools, in the rain, or in humid environments. The OnePlus counters with a slightly lighter and marginally more compact body, which is a genuine comfort benefit, but for most buyers the waterproofing difference is the more consequential spec here.

The display types on both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra are OLED/AMOLED, providing vibrant colors and deep contrasts. The OnePlus has a 6.83″ screen, while the Samsung has a slightly larger 6.9″ display. In terms of pixel density, the Samsung takes the lead with 498 ppi, compared to the OnePlus's 450 ppi. The resolution on the OnePlus is 1272 x 2800 px, while the Samsung offers a higher resolution of 1440 x 3120 px.

Both displays feature a 120Hz refresh rate, ensuring smooth scrolling and responsiveness. Additionally, both devices have branded damage-resistant glass to protect the screen from scratches and minor impacts.

When it comes to HDR support, both phones support HDR10, but the Samsung Galaxy S25 Ultra also supports HDR10+, which the OnePlus does not. The Samsung also has an Always-On Display feature, while the OnePlus does not. Neither device supports Dolby Vision or has a secondary screen, and both have a touch screen.

Both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra offer impressive performance specs. Both devices feature 1024GB of internal storage, but the OnePlus comes with 16GB of RAM, while the Samsung has 12GB of RAM. The OnePlus is powered by the MediaTek Dimensity 9400 Plus chipset, while the Samsung uses the Qualcomm Snapdragon 8 Elite chipset.

In terms of CPU speeds, the OnePlus has a configuration of 1 x 3.73 GHz, 4 x 3.3 GHz, and 3 x 2.4 GHz, whereas the Samsung's CPU is split into 2 x 4.47 GHz and 6 x 3.53 GHz. The OnePlus has a higher GPU clock speed of 1300 MHz, compared to the Samsung's 1200 MHz. As for Geekbench 6 scores, the OnePlus achieved a multi-core score of 8969 and a single-core score of 2874, while the Samsung scored 9846 for multi-core and 3057 for single-core.

Both devices support 64-bit architecture and use big.LITTLE technology, with 8 CPU threads, HMP, and multithreading. The maximum memory bandwidth for both is very close, with the OnePlus at 85.3 GB/s and the Samsung at 85.1 GB/s. The OnePlus also offers a larger L3 cache of 12 MB, while the Samsung has 8 MB. Both devices support integrated LTE, integrated graphics, and DDR5 memory, though the Samsung supports ECC memory, while the OnePlus does not.

The OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra both have impressive camera setups, but the Samsung features a significantly more advanced main camera array. The OnePlus has a dual-lens main camera with 50 MP and 8 MP sensors, while the Samsung boasts a multi-lens main camera with 200 MP, 50 MP, 50 MP, and 10 MP sensors.

For the front camera, the OnePlus offers a 16 MP lens with a wide aperture of f/2.4, whereas the Samsung has a 12 MP front camera with a slightly narrower aperture of f/2.2. Both phones feature built-in optical image stabilization and phase-detection autofocus for photos, as well as continuous autofocus when recording video. The OnePlus supports video recording at 2160 x 60 fps, while the Samsung offers 4320 x 30 fps video recording. Both have a dual-tone LED flash with 2 flash LEDs, and both support slow-motion video recording, manual exposure, and raw shooting capabilities.

However, the Samsung does offer additional features like laser autofocus and optical zoom at 5x, which the OnePlus lacks. Neither phone supports HDR10+ recording or has a front-facing LED flash, but the Samsung does support HDR10 recording, while the OnePlus does not. Both devices can create panoramas in-camera, and neither offers 360° panorama shooting or 3D photo/video recording capabilities.

Both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra run on Android 15, offering a wide range of privacy and customization features. Both devices have clipboard warnings, location privacy options, and camera/microphone privacy options, but only the Samsung includes cross-site tracking blocking. Both phones also allow theme customization, app tracking blocking, and have on-device machine learning capabilities.

When it comes to unique features, the OnePlus supports dynamic theming, while the Samsung offers additional functionality with focus modes, Wi-Fi password sharing, and the ability to be used as a PC. Both phones offer similar features like dark mode, battery health checks, customizable notifications, Live Text, full-page screenshots, and the ability to play games while they download.

Other similarities include PiP (picture-in-picture), offline voice recognition, voice commands, multi-user system support, and the ability to track the device's current position. Neither device provides direct OS updates, and neither has Quick Start. Both devices also support widgets and child lock features, and both are free and open source. The Samsung has a slight advantage in offering focus modes, Wi-Fi password sharing, and the ability to function as a PC, which the OnePlus does not.

The OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra differ significantly in their battery specs. The OnePlus features a larger 7000 mAh battery, while the Samsung comes with a smaller 5000 mAh battery. Both devices support fast charging, but the OnePlus supports a much higher charging speed of 100W, compared to the Samsung’s 45W.

In terms of additional features, the Samsung supports wireless charging, while the OnePlus does not. The OnePlus, however, comes with a charger included, whereas the Samsung does not. Both devices have a non-removable, rechargeable battery and include a battery level indicator.

Neither device has a removable battery, and both feature a rechargeable battery with a battery level indicator. The OnePlus Ace 5 Ultra does not support wireless charging, while the Samsung Galaxy S25 Ultra includes this feature.

Both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra do not include a 3.5 mm audio jack. However, both devices come equipped with stereo speakers for audio output. In terms of wireless audio capabilities, both phones support aptX, but only the Samsung supports LDAC and aptX HD. Neither device supports aptX Lossless or aptX Adaptive.

Neither the OnePlus nor the Samsung includes a radio, but both support high-quality wireless audio standards with aptX, which allows for better sound quality over Bluetooth compared to standard codecs.

Both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra support 5G and have NFC capabilities. They also both use USB Type-C ports, but the OnePlus features USB version 2, while the Samsung has USB version 3.2, allowing for faster data transfer speeds. The Samsung has a higher download speed of 10000 MBits/s compared to the OnePlus's 7300 MBits/s.

In terms of wireless connectivity, both devices support Wi-Fi 4, Wi-Fi 5, Wi-Fi 6, and Wi-Fi 7, but the Samsung adds support for Wi-Fi 6E. Both devices feature a fingerprint scanner, have GPS, a compass, an accelerometer, and a cellular module, but the Samsung has additional features like a barometer and support for ANT+ technology, which the OnePlus lacks.

Neither phone supports 3D facial recognition or an iris scanner, and neither has a built-in projector. The OnePlus has an infrared sensor, which the Samsung does not. The Samsung also includes a stylus, which is not available with the OnePlus. Both devices do not have emergency SOS via satellite, crash detection, DLNA certification, or motion/optical tracking capabilities.

Both the OnePlus Ace 5 Ultra and Samsung Galaxy S25 Ultra are equipped with a video light, which can assist in low-light photography or video recording. Neither device features sapphire glass for the display, and neither has a curved display or an e-paper display, both of which are often found in premium or specialized devices.

The specifications for these features are identical for both devices, with neither offering standout differences in terms of display materials or specialized display types.