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vivo V21 5G vs Xiaomi POCO X3 Pro

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

Better figure, where one is clearly better

vivoV21 5GXiaomiPOCO X3 Pro
Overview
ReleasedMay 2021March 2021
Display
Screen size6.44″6.67″
Resolution2404 × 10802400 × 1080
Sharpness409 pixels per inch395 pixels per inch
PanelOLEDLCD
Refresh rate90 Hz120 Hz
Peak brightness800 nits–
Display typeE3 AMOLED; current global parameter sheet lists 2,404 × 1,080 pixels, whereas the reviews list 2,400 × 1,080LCD DotDisplay, as identified by Android Authority; 20:9 aspect ratio
Pixel density–Maker lists 395 ppi
Brightness detail500 nits typical, 800 nits HBM450 nits typical; peak brightness not published
Screen protection–Corning Gorilla Glass 6
Always-on displayAlways-on display, TechAdvisor–
Display featuresHDR10+, 6,000,000:1 contrast; 60 Hz default with Smart Switch, 60 Hz and 90 Hz settings; some applications remain at 60 HzDynamicSwitch at 30/50/60/90/120 Hz, 240 Hz touch sampling, sunlight display, reading mode 3.0 and Widevine L1
Performance
ChipMediaTek Dimensity 800UQualcomm Snapdragon 860
Memory8 GB6 GB – 8 GB
Storage128 GB, 256 GB128 GB, 256 GB
CPU7 nm octa-core processor, up to 2.4 GHz7 nm Kryo 485 octa-core processor at up to 2.96 GHz
GPU–Adreno 640
Storage typeUFS 2.2; 8 GB physical RAM with 128 GB or 256 GB storage globally; global overview describes 3 GB extended RAM from storage, current India overview describes 4 GB; UK 128 GB model identified by TechAdvisor and TechRadarLPDDR4X RAM and UFS 3.1 storage; UK 6 GB/128 GB and 8 GB/256 GB; microSD expansion up to 1 TB, tested by maker with a SanDisk card
Cooling–LiquidCool Technology 1.0 Plus with multi-layer graphite and D5 copper heat pipe; maker claim of up to 6°C processor cooling
Cameras
Main camera64 MP48 MP
Ultra wide camera8 MP8 MP
Telephoto cameraNoneNone
Optical zoomNoneNone
Front camera44 MP20 MP
Main cameraAutofocus, f/1.79, four-axis OIS48 MP, f/1.79, 1/2-inch sensor, 4-in-1 binning to 1.6 µm and autofocus
Ultra wide cameraf/2.2, 120° lens angle or 108° after distortion correction8 MP, f/2.2 and 119° field of view
Front cameraAutofocus, f/2.0, OIS and dual Selfie Spotlight lights; 44 MP output in 16:11 mode only20 MP, f/2.2 and 4-in-1 binning to 1.6 µm
Video recordingRear 4K at 30 fps and 1080p at 60 fps, TechAdvisor; maker says OIS and EIS are unavailable in 4K at 30 fps4K at 30 fps, Full HD at 30/60 fps and HD at 30 fps
Front video4K at 30 fps without OIS or EIS; Ultra Stable Selfie VideoFull HD at 30 fps, as reported by TechAdvisor
Camera features2 MP f/2.4 macro camera with 4 cm focus distance; eye autofocus, night portrait, dual-view video, double exposure and multi-style portraitAdditional 2 MP f/2.4 macro camera with 4 cm fixed focus and 2 MP f/2.4 depth camera; rear, ultra wide and selfie night modes; simultaneous front/rear dual video
Battery and charging
Battery4,000 mAh5,160 mAh
Video playback (maker's claim)–Up to 18 hours
Wired chargingUp to 33 WUp to 33 W
Wireless chargingNoneNone
Battery life detailTypical capacity5,160 mAh typical; maker laboratory claims 11 hours gaming, 18 hours video and 110 hours music
Wired charging11 V/3 A FlashCharge adapter; up to 63% in 30 minutes in maker laboratory tests at 25℃ ±1℃, starting at 1% with screen off; actual charging power varies33 W fast charging with included 33 W adaptor and Middle Middle Tab technology; maker laboratory claims 59% in 30 minutes and full charge in 59 minutes
Wireless chargingNo wireless charging, TechAdvisor–
Design
TypeStandardStandard
Weight176 g215 g
Thickness7.29 mm9.4 mm
Height × width159.68 × 73.9 mm165.3 × 76.8 mm
Water and dust resistance–IP53
MaterialsAG matte glass back and flat frame; maker glass description differs from TechAdvisor's plastic-back descriptionDual-texture back with reflective central strip and metallic-texture sides; plastic back, as described by TechAdvisor
ColoursDusk Blue at 176 g and 7.29 mm; Sunset Dazzle and Arctic White at 177 g and 7.39 mm; UK maker release lists Dusk Blue and Sunset DazzlePhantom Black, Metal Bronze and Frost Blue
Water resistance detail–IP53 splash protection; not immersion protection, and liquid/dust damage is excluded from warranty
BiometricsIn-display fingerprint scanningSide fingerprint reader and AI Face Unlock
SensorsAccelerometer, ambient light sensor, e-compass, proximity sensor and gyroscopeProximity, ambient light, accelerometer, compass and IR blaster; Z-axis linear vibration motor
SpeakersSingle speaker, TechAdvisorStereo speakers, 3.5 mm headphone socket and Hi-Res Audio
Software
Operating systemAndroidAndroid
Software at launchFuntouch OS 11.1; Android 11 identified by both reviewsMIUI 12 for POCO based on Android 11, as reported by both reviews
In the boxPhone, headset, documentation, USB-C cable, power adapter, earphone jack adapter, SIM eject tool, case and applied protective film; accessories vary by regionPhone, power adaptor, USB-C cable, SIM tool, protective case, user guide and warranty card
Connectivity
Mobile networkGlobal bands GSM B2/3/5/8; WCDMA B1/2/4/5/8; LTE FDD B1/2/3/4/5/7/8/20/28, TDD B38/39/40/41F as printed by maker; 5G n1/3/7/28/41/78; SA and NSA subject to carrier and software4G LTE FDD B1/B2/B3/B4/B5/B7/B8/B20/B28 and TDD B38/B40/B41; WCDMA B1/B2/B4/B5/B8 and GSM 850/900/1800/1900 MHz
SIMHybrid slot for one nano-SIM plus a second nano-SIM or microSD card; dual standby; 5G + 5G dual SIM on NSA networks onlyHybrid dual nano-SIM or one SIM plus microSD, as clarified by Android Authority
Wi-Fi2.4 GHz and 5 GHz; Wi-Fi 5 identified by TechAdvisorWi-Fi 5, 2.4/5 GHz and 2×2 MIMO
BluetoothBluetooth 5.1Bluetooth 5.0
NFCSupported in Europe, Saudi Arabia, UAE, South Africa, Hong Kong, Taiwan and Singapore; NFC-eSE in Indonesia; other regions not confirmed by global sheetMultifunction NFC with Google Pay; availability varies by market
USBUSB-C with OTG; no 3.5 mm headphone socket, TechAdvisorUSB-C
PositioningGPS, BeiDou, Galileo and GLONASSGPS, A-GPS, GLONASS, BeiDou and Galileo

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