Xiaomi Redmi Note 9 vs Samsung Galaxy A51 5G UW

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PHONES
Phone Names Xiaomi Redmi Note 9 Samsung Galaxy A51 5G UW
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 850 / 900 / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 412, 4, 5, 13, 66
5G bands-260, 261 mmWave
SpeedHSPA, LTEHSPA, LTE, 5G
TechnologyGSM / HSPA / LTEGSM / HSPA / LTE / 5G
Launch
Announced2020, April 302020, August 14
StatusAvailable. Released 2020, May 12Available. Released 2020, August 14
Body
BuildGlass front (Gorilla Glass 5), plastic frame, plastic backGlass front (Gorilla Glass 3), plastic back, aluminum frame
Dimensions162.3 x 77.2 x 8.9 mm (6.39 x 3.04 x 0.35 in)158.8 x 73.4 x 8.6 mm (6.25 x 2.89 x 0.34 in)
SIMNano-SIM + Nano-SIMNano-SIM (pre-installed)
Weight199 g (7.02 oz)188.8 g (6.67 oz)
 Water-repellent coating-
Display
ProtectionCorning Gorilla Glass 5Corning Gorilla Glass 3
Resolution1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density)1080 x 2400 pixels, 20:9 ratio (~405 ppi density)
Size6.53 inches, 104.7 cm2 (~83.5% screen-to-body ratio)6.5 inches, 102.0 cm2 (~87.5% screen-to-body ratio)
TypeIPS LCD, 450 nits (typ)Super AMOLED
Platform
CPUOcta-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver)
ChipsetMediatek MT6769Z Helio G85 (12 nm)Qualcomm SM7250 Snapdragon 765G 5G (7 nm)
GPUMali-G52 MC2Adreno 620
OSAndroid 10, upgradable to Android 12, MIUI 13Android 10, One UI 2
Memory
Card slotmicroSDXC (dedicated slot)microSDXC (uses shared SIM slot)
Internal64GB 3GB RAM, 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM128GB 6GB RAM
 -UFS 2.1
Main Camera
FeaturesLED flash, HDR, panoramaLED flash, panorama, HDR
Quad48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 118˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro), AF Auxiliary lens48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF 12 MP, f/2.2, 123˚ (ultrawide) 5 MP (macro) Auxiliary lens
Single-5 MP, AF
Video1080p@30fps4K@30fps, 1080p@30/120fps; gyro-EIS
Selfie camera
FeaturesHDR, panoramaHDR
Single13 MP, f/2.3, 29mm (standard), 1/3.1", 1.12µm32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm
Video1080p@30fps4K@30fps, 1080p@30fps
Sound
3.5mm jack YesYes
35mm jackYesYes
Loudspeaker YesYes
Comms
Bluetooth5.0, A2DP, LE5.0, A2DP, LE
Infrared portYes-
NFCYes (market/region dependent)M2003J15SG (Yes); M2003J15SS (No)Yes
PositioningGPS, GLONASS, GALILEO, BDSGPS, GLONASS, GALILEO, BDS
RadioFM radio, built-in antennaFM radio, RDS, recording
USBUSB Type-C 2.0USB Type-C 2.0, OTG
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Features
SensorsFingerprint (rear-mounted), accelerometer, gyro, proximity, compassFingerprint (under display, optical), accelerometer, gyro, proximity, compass
 -ANT+
Battery
Charging18W wired 9W reverse wired15W wired
Stand-by-Up to 672 h
Talk time-Up to 5 h
TypeLi-Po 5020 mAhLi-Po 4500 mAh
Misc
ColorsForest Green, Midnight Grey, Polar WhitePrism Bricks Blue
ModelsM2003J15SC, M2003J15SG, M2003J15SSSM-A516V
Price€ 88.99 / $ 85.68 / £ 136.28About 470 EUR
SAR0.84 W/kg (head)     0.90 W/kg (body)0.70 W/kg (head)     1.25 W/kg (body)    
SAR EU0.80 W/kg (head)     1.14 W/kg (body)0.59 W/kg (head)     1.32 W/kg (body)
Tests
Battery lifeEndurance rating 125h-
Camera Photo / Video-
Display Contrast ratio: 1242:1 (nominal)-
Loudspeaker -30.1 LUFS (Below average)-
Performance AnTuTu: 200414 (v8) GeekBench: 1292 (v5.1)-
OUR TESTS
Battery (old)Endurance rating 125h-
CameraPhoto / Video-
Display1242:1 contrast ratio, 370 nits max brightness (measured)-
Loudspeaker-30.1 LUFS (Below average)-
PerformanceAnTuTu: 200414 (v8) GeekBench: 1292 (v5.1)-