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Samsung Galaxy S21 Ultra vs Xiaomi Mi 11 Ultra

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

SamsungGalaxy S21 UltraXiaomiMi 11 Ultra
Overview
ReleasedJanuary 2021April 2021
Display
Screen size6.8″6.81″
Resolution3200 × 14403200 × 1440
Sharpness516 pixels per inch515 pixels per inch
PanelOLEDOLED
Refresh rate120 Hz120 Hz
Peak brightness–1,700 nits
Display typeEdge QHD+ Dynamic AMOLED 2X Infinity-O Display (3,200 × 1,440), HDR10+ certified; adaptive 120 Hz (10–120 Hz); 6.8 inches as a full rectangle, 6.6 inches with rounded cornersQuad-curved AMOLED with Gorilla Glass Victus; rear 1.1-inch AMOLED display (Tech Advisor).
Pixel density515 ppi–
Brightness detail1,500 nits peak–
Screen protectionCorning Gorilla Glass Victus front and back–
Display featuresEye Comfort Shield900 nits high-brightness mode, 480 Hz touch sampling, 10-bit colour, Dolby Vision and HDR10+.
Performance
ChipExynos 2100Qualcomm Snapdragon 888
Memory12 GB – 16 GB12 GB
Storage128 GB, 256 GB, 512 GB256 GB
CPU5 nm, 64-bit octa-core, 2.9 GHz + 2.8 GHz + 2.2 GHz; 12 GB of LPDDR5 RAM, or 16 GB with 512 GBSnapdragon 888, 5 nm process and Kryo 680 up to 2.84 GHz.
GPU–Adreno 660.
Storage type128, 256 or 512 GB; no microSD slotLPDDR5 and UFS 3.1; no microSD expansion (TechRadar).
Cameras
Main camera108 MP50 MP
Ultra wide camera12 MP48 MP
Telephoto camera10 MP48 MP
Optical zoom10×5×
Front camera40 MP20 MP
Main camera108 MP wide-angle, phase detection AF, OIS, F1.8, 0.8 µm, 83°; laser AF sensorf/1.95, 1/1.12-inch Samsung GN2 sensor, optical stabilisation and four-pixel binning to 2.8 µm; Dual Pixel Pro and laser focus.
Ultra wide camera12 MP Dual Pixel AF, F2.2, 1.4 µm, 120°f/2.2, 128° field of view and phase-detection autofocus; maker overview lists a 1/2-inch sensor and 12 mm equivalent focal length.
Telephoto camera10 MP Dual Pixel AF, 10x optical, OIS, F4.9, 1.22 µm, 10°Periscope with OIS and 5× optical zoom; f/4.1 aperture (Tech Advisor). 10× hybrid and 120× digital zoom are separate. Maker overview lists a 1/2-inch sensor and 120 mm equivalent focal length.
Second telephoto camera10 MP Dual Pixel AF, 3x optical, OIS, F2.4, 1.22 µm, 35°–
Front camera40 MP phase detection AF, F2.2, 0.7 µm, 80°–
Zoom3x and 10x optical; 100x Space Zoom–
Video recording8K at 24 fps; 4K at 60 fpsAll three rear cameras support 8K at 24 fps and 4K at 30/60 fps.
Front video–1080p at 30/60 fps; f/2.2 selfie aperture (Tech Advisor).
Camera features–Rear display can frame main-camera selfies; night and movie-effect modes. Reviewers disagree about the ultra-wide results.
Battery and charging
Battery5,000 mAh5,000 mAh
Video playback (maker's claim)Up to 22 hours–
Wired chargingUp to 25 WUp to 67 W
Wireless chargingUp to 15 WUp to 67 W
Battery life detail5,000 mAh typical, 4,855 mAh rated; wireless video playback up to 22 hours; internet use up to 18 hours (LTE) or 18 hours (Wi-Fi); talk time up to 41 hours (4G)5,000 mAh typical, 4,900 mAh minimum.
Wired chargingUSB PD 3.0 (PPS) fast charging, AFC and QC2.0 compatible; 25 WUK 67 W charger included; Tech Advisor's Indian unit information instead describes a 55 W bundled charger.
Wireless chargingFast Wireless Charging 2.0 (WPC); 15 W67 W wireless and 10 W reverse wireless charging; Tech Advisor did not test the maximum wireless rate.
Charges other devicesWireless PowerShare–
Design
TypeStandardStandard
Weight227 g234 g
Thickness8.9 mm8.38 mm
Height × width165.1 × 75.6 mm164.3 × 74.6 mm
Water and dust resistanceIP68IP68
StylusYes–
MaterialsMetal frame with Contour Cut camera housing; Deluxe Frosted Haze matte finishCeramic back and Gorilla Glass Victus over the display; maker ceramic specification controls TechRadar's rear-glass description.
ColoursPhantom Black, Phantom Silver; Phantom Titanium, Phantom Navy and Phantom Brown on Samsung.comCeramic Black and Ceramic White.
Water resistance detailIP68, up to 1.5 m of fresh water for up to 30 minutes; not advised for beach or pool useIP68 tested at 1.5 metres for up to 30 minutes under laboratory conditions.
BiometricsUltrasonic in-screen fingerprint sensor, face recognitionIn-display fingerprint sensor (Tech Advisor).
SensorsUltrasonic fingerprint, accelerometer, barometer, gyro, geomagnetic, Hall, proximity, ambient light–
SpeakersStereo speakers; UHQ 32-bit and DSD64/128 playbackStereo speakers tuned with Harman Kardon.
Software
Operating systemAndroidAndroid
Software at launchAndroid 11MIUI 12 based on Android 11; maker page notes the MIUI 12.5 update.
In the box–UK charger, cable, USB-C to 3.5 mm adapter, case, SIM tool and documents. The UK maker's 12/256 configuration is used; other regional memory options are not inferred. Contemporary Gizmochina actual first-sale coverage on 2 April 2021 supports the Chinese sale month, with later UK availability distinguished.
Connectivity
Mobile network5G (NSA, SA), Sub6–
SIMNano-SIM and eSIMDual SIM; network support depends on regional bands and operators.
Wi-FiWi-Fi 6E (802.11a/b/g/n/ac/ax), HE160, MIMO, 1024-QAMWi-Fi 6; Wi-Fi 6E availability depends on regions and an OTA update, as qualified by the maker.
BluetoothBluetooth 5.2Bluetooth 5.2.
Ultra WidebandYes–
NFCYesNFC.
USBUSB Type-C, USB 3.2 Gen 1; DisplayPort output up to 4K at 60 fpsUSB-C; no 3.5 mm socket (TechRadar).
PositioningGPS, Galileo, Glonass, BeiDou–

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