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Xiaomi Redmi Note 7 vs Xiaomi Redmi Note 9S

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

Better figure, where one is clearly better

XiaomiRedmi Note 7XiaomiRedmi Note 9S
Overview
ReleasedJanuary 2019March 2020
Display
Screen size6.3″6.67″
Resolution2340 × 10802400 × 1080
Sharpness409 pixels per inch395 pixels per inch
PanelLCDLCD
Refresh rate–60 Hz
Display typeLCD panel identified by PhoneArena; Dot Drop display, 19.5:9 aspect ratio and 1,500:1 typical contrastIPS LCD and 60 Hz refresh identified by Tech Advisor; DotDisplay, 1,500:1 typical contrast and 84% NTSC typical
Screen protectionCorning Gorilla Glass 5Corning Gorilla Glass 5 front and back
Display features84% NTSC typical; sunlight, night, reading and standard modes; colour-temperature adjustmentTÜV Rheinland low blue light certification and Reading mode 2.0
Performance
ChipQualcomm Snapdragon 660Qualcomm Snapdragon 720G
Memory3 GB – 4 GB4 GB – 6 GB
Storage32 GB, 64 GB, 128 GB64 GB, 128 GB
CPUSnapdragon 660 AIE octa-core processor at up to 2.2 GHzOcta-core Snapdragon 720G at up to 2.3 GHz; 8 nm process and Qualcomm fifth-generation AI engine
GPUAdreno 512 at up to 850 MHzAdreno 618
Storage typeUK configurations of 3/32 GB, 4/64 GB and 4/128 GB; microSD expansion up to 256 GBUK configurations of 4/64 GB and 6/128 GB; dedicated microSD expansion up to 512 GB
Cameras
Main camera48 MP48 MP
Ultra wide cameraNone8 MP
Telephoto cameraNoneNone
Optical zoomNoneNone
Front camera13 MP16 MP
Main camera48 MP with f/1.8 aperture, PDAF, 4-in-1 binning to 1.6 µm pixels and EIS; additional 5 MP depth camera48 MP, f/1.79, 1/2-inch sensor, 79° field of view, six-element lens and autofocus; 0.8 µm pixels or 4-in-1 binning to 1.6 µm; up to 8,000 × 6,000 photos
Ultra wide camera–8 MP, f/2.2 and 1.12 µm pixels; 119° field of view before distortion correction and 108° after correction
Front camera13 MP; AI portrait and beauty modes, HDR, face recognition and selfie timer16 MP, f/2.48 and 1.0 µm pixels; panorama selfie, palm shutter, HDR, face recognition, AI beauty, portrait and scene detection
Video recordingFull HD at 30/60 fps or HD at 30 fps; Full HD and HD slow motion at 120 fps, as published by Xiaomi despite Tech Advisor's contrary slow-motion comment4K at 30 fps, Full HD at 30/60 fps and HD at 30 fps; Full HD slow motion at 120 fps or HD at 120/240/960 fps; ultrawide and macro recording, short video and cinematic 4K
Front videoFull HD or HD at 30 fps120 fps slow-motion selfies
Camera featuresNight photography, portrait background blur, single-tone flash, low-light enhancement, standard/auto HDR, burst and panorama; 27 rear and 12 front AI scene categories; 48 MP Pro mode at launch, with Photo mode support promised by OTAAdditional 5 MP macro with f/2.4, 1.12 µm pixels and autofocus at 2–10 cm; 2 MP depth sensor with f/2.4 and 1.75 µm pixels; night, document, cinematic portrait, 48 MP, Pro, panorama, burst, HDR, timer, levelling, watermark and kaleidoscope modes; 27 rear AI scene tags
Battery and charging
Battery4,000 mAh5,020 mAh
Wired charging–Up to 18 W
Wireless chargingNoneNone
Battery life detail4,000 mAh typical and 3,900 mAh minimum5,020 mAh typical non-removable lithium-ion polymer battery; maker laboratory claims of 147 hours music, 33 hours calling, 16 hours navigation or 13 hours gaming
Wired chargingQuick Charge 4 protocol; included adaptor is 5 V / 2 A, and Xiaomi specifies a separately purchased Quick Charge 4 charger for optimal efficiencyPhone supports 18 W wired charging; included adaptor is rated at 22.5 W
Design
TypeStandardStandard
Weight186 g209 g
Thickness8.1 mm8.8 mm
Height × width159.21 × 75.21 mm165.75 × 76.68 mm
MaterialsGradient glass back finish3D curved glass back; plastic frame, as described by Tech Advisor
Colours–Interstellar Grey, Aurora Blue and Glacier White
Water resistance detail–Splash-proof nano-coating; no published IP rating
BiometricsRear fingerprint reader; face recognitionSide fingerprint reader combined with the power button; AI face unlock
SensorsGyroscope, accelerometer, distance, compass, fingerprint, ambient light, vibration motor and IR blasterZ-axis linear vibration motor, fingerprint, distance, in-screen ambient light, accelerometer, gyroscope, compass and IR blaster
SpeakersSingle bottom speaker and 3.5 mm headphone socket, as described by PhoneArena1216 ultra-linear speaker with 0.5 mm maximum amplitude and 10 V Smart PA; 3.5 mm headphone socket
Software
Operating systemAndroidAndroid
Software at launchAndroid 9 Pie with MIUI 10, as reported by Tech AdvisorAndroid 10 with MIUI 11, as reported by both reviews
In the boxPhone, power adaptor, USB-C cable, SIM tool, user guide, clear soft case and warranty cardPhone, power adaptor, protective cover, USB-C cable, SIM tool, user guide and warranty card
Connectivity
Mobile networkLTE FDD B1/B2/B3/B4/B5/B7/B8/B20 and TDD B38/B40; WCDMA B1/B2/B4/B5/B8 and GSM B2/B3/B5/B8Dual SIM VoLTE, subject to local operator support; LTE FDD B1/B2/B3/B4/B5/B7/B8/B20/B28 and TDD B38/B40; WCDMA B1/B2/B4/B5/B8 and GSM B2/B3/B5/B8
SIMHybrid tray for two SIMs or one SIM plus microSD; either SIM can be selected as primary for 4G+/4G/3G/2G calls and dataTwo nano-SIM slots plus a separate microSD slot
Wi-FiWi-Fi 802.11 a/b/g/n/ac, 2.4/5 GHz and Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac, 2.4/5 GHz and Wi-Fi Direct
BluetoothBluetooth 5.0Bluetooth 5.0
NFCNo NFC, as reported by Tech AdvisorNo NFC, as confirmed by both reviews
USBUSB-CUSB-C; USB 2.0 controller identified by Notebookcheck
PositioningGPS, A-GPS, GLONASS and BeiDouGPS, A-GPS, GLONASS and BeiDou

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