Xiaomi 15 Ultra Vs Galaxy S25 Ultra

Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra : which one is the best?

The Xiaomi 15 Ultra and Samsung Galaxy S25 Ultra compete with exceptional performance, stunning screens and state-of-the-art cameras, redefining the standards for high-end smartphones in 2024.

Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra : Comparison


The world of high-end smartphones is abuzz with the arrival of two behemoths: the Xiaomi 15 Ultra and the Samsung Galaxy S25 Ultra. These two tech giants are vying for supremacy with impressive features, technological innovations and refined designs. We’ve reviewed both devices to offer you a detailed comparison. Find out which of these two titans deserves your attention.

Design and construction

The Xiaomi 15 Ultra boasts an elegant, futuristic design with a ceramic chassis and curved screen edges. Its camera module, positioned centrally at the rear, gives a symmetrical, balanced look. The smartphone is available in several sophisticated colors, adding a touch of luxury to its appearance.

Samsung’s Galaxy S25 Ultra relies on a refined, ergonomic design with a matte glass back and aluminum frame. The screen extends almost to the edges, offering an immersive visual experience. The camera module, seamlessly integrated into the shell, reduces protrusions and ensures a comfortable grip.


The Xiaomi 15 Ultra features a 6.9-inch AMOLED display with 2K resolution and 120Hz refresh rate. This screen promises vivid colors, infinite contrast and impressive fluidity, ideal for gaming and multimedia consumption.

Samsung is not to be outdone with its 6.8-inch Dynamic AMOLED display, also offering 2K resolution and an adaptive refresh rate of up to 120 Hz. Samsung’s AMOLED technology is renowned for its deep blacks and vibrant colors, delivering outstanding image quality.


The Xiaomi 15 Ultra is powered by the latest Snapdragon 8 Gen 3 processor, coupled with up to 16GB of RAM. This combination guarantees fast, smooth performance, whether for multitasking, demanding games or resource-hungry applications.

The Galaxy S25 Ultra uses the Exynos 2400 processor (or Snapdragon 8 Gen 3, depending on region), paired with 12 or 16 GB RAM. This configuration ensures impressive processing power, capable of effortlessly handling the most intensive tasks.


Xiaomi relies on a quad camera system with a 200 MP main sensor, a 50 MP ultra wide-angle, a 50 MP periscopic telephoto and a depth sensor. This setup enables detailed and versatile shots, suitable for all photography situations.

Samsung responds with a similar setup, featuring a 200 MP main sensor, 40 MP ultra wide-angle, 50 MP periscopic telephoto and depth sensor. Samsung’s image processing technology promises sharp photos and stable videos, even in low-light conditions.

Battery and autonomy

The Xiaomi 15 Ultra features a 5000 mAh battery, supporting 120W wired fast charging and 50W wireless charging. This generous battery ensures long-lasting autonomy, even for intensive users.

The Galaxy S25 Ultra features a 5000 mAh battery with 100W wired fast charging and 45W wireless charging. Samsung optimizes battery management to offer competitive autonomy and reduced charging times.

Software & Features

The Xiaomi 15 Ultra runs MIUI 15, based on Android 15. MIUI is known for its many customization options and advanced features. Xiaomi continues to innovate with tools such as super energy-saving mode and privacy control options.

Samsung uses One UI 6, based on Android 15, for its Galaxy S25 Ultra. One UI is appreciated for its intuitive user interface and practical features such as Samsung DeX, which turns the smartphone into a workstation.

Price and availability

The Xiaomi 15 Ultra will start at €1199, a competitive price given its high-end specifications.

The Galaxy S25 Ultra, with a starting price of €1299, will be slightly more expensive, justified by Samsung’s reputation and extended software support.

Weight :225 g232 g or 233 g
Build :Dual SIM (Nano-SIM, dual stand-by)Glass front (Gorilla Glass Armor), glass back (Gorilla Glass), titanium frame
Dimensions161.4 x 75.3 x 9.2 mm162.3 x 79 x 8.6 mm
Weight225 g232 g or 233 g
BuildDual SIM (Nano-SIM, dual stand-by)Glass front (Gorilla Glass Armor), glass back (Gorilla Glass), titanium frame
Waterproof IP68 dust/water resistant (up to 1.5m for 30 min)IP68 dust/water resistant (up to 1.5m for 30 min)
Screen typeLTPO AMOLED, 68B colors, 120Hz, Dolby Vision, HDR10+, 3000 nits (peak)Dynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak)
Screen size6.78 inches6.8 inches
Resolution1440 x 3200 pixels1440 x 3088 pixels
ProtectionXiaomi Longjing GlassCorning Gorilla Glass Armor
OSAndroid 15, HyperOSAndroid 15, One UI 7.1
ChipsetSnapdragon 8 Gen 4 (3 nm)Snapdragon 8 Gen 4 (3 nm)
GPUAdreno 750Adreno 750
Internal storage256GB - 1TB256GB, 512GB, 1TB
Card slotNoNo
Main camera

50 MP, f/1.6 or f/4.0, 23mm (wide)
50 MP, f/2.5, 120mm (periscope telephoto)
50 MP, f/1.8, 75mm (telephoto)
50 MP, f/1.8, 12mm, 122˚ (ultrawide)
TOF 3D, (depth)

Video : 8K@30fps (HDR), 4K@24/30/60fps (HDR10+)

200 MP, f/1.7, 24mm (wide)
50 MP, f/3.4, 111mm (periscope telephoto)
10 MP, f/2.4, 67mm (telephoto)
12 MP, f/2.2, 13mm, 120˚ (ultrawide)

Video : 8K@24/30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 1080p@960fps

Selfie camera32 MP (4K@30/60fps)12 MP(4K@30/60fps, 1080p@30fps)
SensorsFingerprint (under display, optical)Fingerprint (under display, ultrasonic)
Battery5300 mAh5000 mAh
Charging90W Fast charging65W Fast Charging
WLANWi-Fi 802.11 a/b/g/n/ac/6e/7Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Bluetooth5.4, A2DP, LE, aptX HD, aptX Adaptive5.3, A2DP, LE
USBUSB Type-C 3.2 Gen 2, OTGUSB Type-C 3.2, OTG
3.5mm JackNoNo
LoudspeakerYes, with stereo speakersYes, with stereo speakers
price summary
Price$1199$ 1,299.99

summary of Xiaomi 15 Ultra vs Samsung Galaxy S25 Ultra : which one is the best?

Both smartphones offer outstanding performance and high-end features. The choice between the Xiaomi 15 Ultra and the Samsung Galaxy S25 Ultra will depend on your personal priorities: the Xiaomi seduces with its futuristic design and competitive price, while the Samsung impresses with its unrivalled screen quality and robust ecosystem. Either way, these two devices represent the pinnacle of technological innovation in 2024.

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