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Xiaomi Mi 11 Ultra vs Xiaomi Xiaomi 15

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

Better figure, where one is clearly better

XiaomiMi 11 UltraXiaomiXiaomi 15
Overview
ReleasedApril 2021October 2024
Display
Screen size6.81″6.36″
Resolution3200 × 14402670 × 1200
Sharpness515 pixels per inch460 pixels per inch
PanelOLEDOLED
Refresh rate120 Hz120 Hz
Peak brightness1,700 nits3,200 nits
Display typeQuad-curved AMOLED with Gorilla Glass Victus; rear 1.1-inch AMOLED display (Tech Advisor).CrystalRes AMOLED with 1–120 Hz adaptive refresh, 68 billion colours and DCI-P3
Pixel density–460 ppi
Brightness detail–3,200 nits peak covering 25% of the screen
Always-on display–Always-active Display with adaptive brightness and refresh as low as 1 Hz; weather display supported
Screen protection–Xiaomi Shield Glass
Display features900 nits high-brightness mode, 480 Hz touch sampling, 10-bit colour, Dolby Vision and HDR10+.DC dimming, 300 Hz touch sampling, Original Colour PRO, Pro HDR, wet touch, HDR10, HDR10+, Dolby Vision and TÜV low-blue-light, flicker-free and circadian-friendly certifications
Performance
ChipQualcomm Snapdragon 888Qualcomm Snapdragon 8 Elite
Memory12 GB12 GB
Storage256 GB256 GB, 512 GB
CPUSnapdragon 888, 5 nm process and Kryo 680 up to 2.84 GHz.3 nm Qualcomm Oryon CPU; two prime cores up to 4.32 GHz and six performance cores up to 3.53 GHz
GPUAdreno 660.Qualcomm Adreno GPU; maker gives no numeric suffix
AI engine–Qualcomm AI engine
Storage typeLPDDR5 and UFS 3.1; no microSD expansion (TechRadar).LPDDR5X RAM at 8,533 Mbps and UFS 4.0 storage; UK 12 GB/256 GB or 12 GB/512 GB
Cooling–Xiaomi Wing-type IceLoop system
Cameras
Main camera50 MP50 MP
Ultra wide camera48 MP50 MP
Telephoto camera48 MP50 MP
Optical zoom5×2.6×
Front camera20 MP32 MP
Main cameraf/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.Leica Summilux, Light Fusion 900, 50 MP, f/1.62, OIS, 23 mm equivalent focal length, 1/1.31-inch sensor, seven-element lens and 4-in-1 binning to 2.4 µm pixels
Ultra wide cameraf/2.2, 128° field of view and phase-detection autofocus; maker overview lists a 1/2-inch sensor and 12 mm equivalent focal length.Leica 50 MP, f/2.2, 14 mm equivalent focal length, 115° field of view and six-element lens
Telephoto cameraPeriscope 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.Leica floating 50 MP, f/2.0, OIS, 60 mm equivalent focal length and six-element lens; focusing from 10 cm to infinity
Front camera–32 MP, f/2.0, 21 mm equivalent focal length and 90° field of view
Zoom–2.6× optical telephoto identified by Tech Advisor and Expert Reviews; maker lists 23 mm main and 60 mm telephoto and up to 60× digital zoom
Video recordingAll three rear cameras support 8K at 24 fps and 4K at 30/60 fps.8K at 24/30 fps; 4K at 24/30/60 fps; Full HD at 30/60 fps; HD at 30 fps; Dolby Vision HDR and 10-bit log; slow motion HD at 120/240/480/960/1,920 fps or Full HD at 120/240/960 fps
Front video1080p at 30/60 fps; f/2.2 selfie aperture (Tech Advisor).4K or Full HD at 30/60 fps, HD at 30 fps; HDR10+ video, teleprompter and time-lapse selfie
Camera featuresRear display can frame main-camera selfies; night and movie-effect modes. Reviewers disagree about the ultra-wide results.Leica Authentic and Vibrant styles, Leica filters, ProFocus motion and eye tracking, Lightning Burst, Dynamic Shots, master portraits, night and 50 MP modes on all rear cameras, macro, Fastshot, Supermoon, RAW/DNG/HEIF/JPEG, Movie mode, ShootSteady, Dual Video and Ultra Night Video
Battery and charging
Battery5,000 mAh5,240 mAh
Wired chargingUp to 67 WUp to 90 W
Wireless chargingUp to 67 WUp to 50 W
Battery life detail5,000 mAh typical, 4,900 mAh minimum.5,240 mAh typical UK Xiaomi Surge Battery; maker laboratory claim of up to 25 hours video playback and approximately 80% capacity after 1,600 cycles; Surge P3 charging and G1 battery-management chips
Wired chargingUK 67 W charger included; Tech Advisor's Indian unit information instead describes a 55 W bundled charger.90 W HyperCharge; QC3+, QC3.0, QC2.0, PD3.0, PD2.0 and MI FC 2.0; separate Xiaomi 90 W adaptor recommended
Wireless charging67 W wireless and 10 W reverse wireless charging; Tech Advisor did not test the maximum wireless rate.50 W wireless HyperCharge with compatible Xiaomi wireless charging set sold separately
Design
TypeStandardStandard
Weight234 g191 g
Thickness8.38 mm8.08 mm
Height × width164.3 × 74.6 mm152.3 × 71.2 mm
Water and dust resistanceIP68IP68
MaterialsCeramic back and Gorilla Glass Victus over the display; maker ceramic specification controls TechRadar's rear-glass description.6M42 high-strength aluminium frame and glass back; Liquid Silver uses heat-moulded glass with wave texture and a plated aluminium frame
ColoursCeramic Black and Ceramic White.Black, White, Green and Liquid Silver; main dimensions and weight are for Black/White/Green, while Liquid Silver is 8.48 mm thick and weighs 192 g
Water resistance detailIP68 tested at 1.5 metres for up to 30 minutes under laboratory conditions.IP68; maker test in static freshwater at 1.5 m for 30 minutes with temperature difference no greater than 5 K; resistance can decline with wear
BiometricsIn-display fingerprint sensor (Tech Advisor).Ultrasonic in-display fingerprint reader and AI Face Unlock
Sensors–Proximity, ambient light, accelerometer, gyroscope, electronic compass, IR blaster, laser-focus sensor, barometer and flicker sensor; X-axis linear vibration motor
SpeakersStereo speakers tuned with Harman Kardon.Stereo speakers, Dolby Atmos, Hi-Res Audio and Hi-Res Wireless Audio
Microphones–Four-microphone array with surround sound recording
Software
Operating systemAndroidAndroid
Software at launchMIUI 12 based on Android 11; maker page notes the MIUI 12.5 update.Xiaomi HyperOS 2; Android 15 confirmed by Tech Advisor and Expert Reviews
Software updates–Four Android version upgrades and six years of security updates reported at launch by Tech Advisor and Expert Reviews
AI features–Regional HyperAI writing, speech recognition, interpreter, search, dynamic wallpapers, creativity and image-editing tools, Google Gemini and Circle to Search; applicable features require internet access and updates
In the boxUK 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.Phone, USB-C cable, SIM tool, protective case, safety information, quick-start guide, warranty card and desiccant; standard UK box excludes adaptor
Connectivity
Mobile network–5G SA/NSA, LTE, UMTS and GSM; 4×4 MIMO; Xiaomi Surge T1S tuner and antenna array
SIMDual SIM; network support depends on regional bands and operators.Dual nano-SIM, nano-SIM plus eSIM or dual eSIM; eSIM depends on region and carrier
Wi-FiWi-Fi 6; Wi-Fi 6E availability depends on regions and an OTA update, as qualified by the maker.Wi-Fi 7/6E/6 capability depends on region and network; 2×2 MIMO, 8×8 sounding for MU-MIMO, Wi-Fi Direct and Miracast
BluetoothBluetooth 5.2.Bluetooth 6.0, Dual-Bluetooth; SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LHDC 5.0 and LC3
NFCNFC.Supported
USBUSB-C; no 3.5 mm socket (TechRadar).USB-C, USB 3.2 Gen 1
Positioning–GPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou, QZSS L1/L5 and NavIC L5; assisted positioning

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