Home > Smartphone comparison > Redmi Note 9S vs A9 (2020) – which one to choose?

Xiaomi Redmi Note 9S vs Oppo A9 (2020)

Here we compared two mid-range smartphones: the 6.67-inch Xiaomi Redmi Note 9S (with Qualcomm Snapdragon 720G) that was released on March 23, 2020, against the Oppo A9 (2020), which is powered by Qualcomm Snapdragon 665 and came out 7 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Xiaomi Redmi Note 9S
  • 81% better performance in AnTuTu Benchmark (279K versus 154K)
  • 46% higher pixel density (395 vs 270 PPI)
  • Delivers 20% higher maximum brightness (585 against 486 nits)
  • Slow-motion recording at 960FPS
  • More energy-efficient CPU – Snapdragon 720G
  • 83% faster in single-core GeekBench 5 test: 582 and 318 points
  • The phone is 7-months newer
  • Has a built-in infrared port
Reasons to consider the Oppo A9 (2020)
  • Stereo speakers
  • Reverse charging feature
  • Supports Dolby Atmos sound technology

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests

Display

Type IPS LCD IPS LCD
Size 6.67 inches 6.5 inches
Resolution 1080 x 2400 pixels 720 x 1600 pixels
Aspect ratio 20:9 20:9
PPI 395 ppi 270 ppi
Refresh rate 60 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 5 Corning Gorilla Glass 3
Screen-to-body ratio 84.5% 82.5%
Display tests
RGB color space 114.9% -
PWM Not detected -
Response time 34 ms -
Contrast 1111:1 -
Max. Brightness
585 nits
486 nits
Sources: NotebookCheck [1]

Design and build

Height 166 mm (6.54 inches) 163.6 mm (6.44 inches)
Width 77 mm (3.03 inches) 75.6 mm (2.98 inches)
Thickness 8.8 mm (0.35 inches) 9.1 mm (0.36 inches)
Weight 210 gramm (7.41 oz) 195 gramm (6.88 oz)
Waterproof No No
Rear material Glass Plastic
Frame material Plastic Plastic
Colors White, Black, Blue Blue, Purple
Fingerprint scanner Yes, in home button Yes, rear
Screen-to-body ratio
84.5%
82.5%

Performance

Tests of Xiaomi Redmi Note 9S and Oppo A9 (2020) in the benchmarks
SoC
Chipset Qualcomm Snapdragon 720G Qualcomm Snapdragon 665
Max. clock 2300 MHz 2000 MHz
CPU cores 8 (2 + 6) 8 (4 + 4)
Architecture - 6 cores at 1.8 GHz: Kryo 465 Silver (Cortex-A55)
- 2 cores at 2.3 GHz: Kryo 465 Gold (Cortex-A76)
- 4 cores at 1.8 GHz: Kryo 260 Silver (Cortex-A53)
- 4 cores at 2 GHz: Kryo 260 Gold (Cortex-A73)
L3 cache 1 MB -
Lithography process 8 nanometers 11 nanometers
Graphics Adreno 618 Adreno 610
GPU clock 750 MHz 600 MHz
FLOPS ~435 GFLOPS ~273 GFLOPS
Memory
RAM size 4 GB 4, 8 GB
Memory type LPDDR4X LPDDR4X
Memory clock 2133 MHz 1866 MHz
Channels 2 2
Storage
Storage size 64 GB 128 GB
Storage type UFS 2.1 UFS 2.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 256 GB

Benchmarks

Geekbench 5 (Single-Core)
582
318
Geekbench 5 (Multi-Core)
1764
1437
AnTuTu Benchmark 7
AnTuTu Benchmark 8
279535
154155

Software

Operating system Android 10.0 Android 9.0 (Can be upgraded to Android 10)
ROM MIUI 12 ColorOS 7
OS size 18 GB -

Battery

Specifications
Capacity 5020 mAh 5000 mAh
Charge power 18 W 18 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No Yes
Fast charging Yes (50% in 50 min) Yes, Quick Charge 3.0 (50% in 40 min)
Full charging time 2:30 hr 2:10 hr

Battery life tests

Web browsing (Wi-Fi)
19:12 hr
n/a
Watching videos (Player)
16:30 hr
n/a
Talk (3G)
41:30 hr
n/a

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 48 megapixels
Image resolution 8000 x 6000 8000 x 6000
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS Up to 30FPS
1080p video recording Up to 60FPS Up to 120FPS
Slow motion 960 FPS (1080p) 480 FPS (720p)
Angle of widest lens 119° 119°
Lenses 4 (48 MP + 8 MP + 5 MP + 2 MP) 4 (48 MP + 8 MP + 2 MP + 2 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
- 48 MP
- Aperture: f/1.8
- Pixel size: 0.8 micron
- Sensor: 1/2.3" (CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0", Omnivision OV8856
- 8 MP
- Aperture: f/2.3
- Focal length: 13 mm
- Pixel size: 1.12 micron
- Sensor: 1/4" (CMOS)
Monochrome lens - - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
Macro lens - 5 MP
- Aperture: f/2.4
- Pixel size: 1.12 micron
-
Depth lens - 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- 2 MP
- Aperture: f/2.4
- Pixel size: 1.75 micron
- Sensor: 1/5" (CMOS)
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
- Pro mode
Selfie camera
Megapixels 16 megapixels 16 megapixels
Image resolution 4920 x 3264 5024 x 3221
Aperture f/2.5 f/2.0
Pixel size 1 microns 1 microns
Sensor type CMOS CMOS
Sensor size 1/3.06" 1/3.1"
Video resolution 1080p (Full HD) при 30 FPS 1080p (Full HD) при 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 b/g/n/ac) Wi-Fi 5 (802.11 b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features LE, HID, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 2 -
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo, NAVIC GPS, GLONASS, Beidou, Galileo
NFC* No Yes
Infrared port Yes No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No No
LTE Cat* 12 12
5G support No No

Sound

Speakers Mono Stereo
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos No Yes
Speakers test
Max. loudness

Other

Category Mid-range Mid-range
Announced March 2020 September 2019
Release date April 2020 September 2019
Launch price ~ 225 USD ~ 250 USD
SAR (head) 0.72 W/kg -
SAR (body) 0.98 W/kg -
Sensors - Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

After analyzing all the data, we think that the Xiaomi Redmi Note 9S is definitely a better buy.

Cast your vote

So, which phone would you choose?
16 (72.7%)
6 (27.3%)
Total votes: 22

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