Samsung Galaxy Note9 vs Galaxy S21 5G

Specs compared side by side, measured on real phones shared by owners with the Device Info app.

Samsung Galaxy Note9Samsung Galaxy Note9Snapdragon 845Change
Samsung Galaxy S21 5GSamsung Galaxy S21 5GExynos 2100Change

Key differences

  1. Chipset: the Galaxy Note9 uses the Snapdragon 845 (10 nm), the Galaxy S21 5G the Exynos 2100 (5 nm Samsung). The Galaxy Note9's fastest core runs at 2.80 GHz, the Galaxy S21 5G's at 2.91 GHz.
  2. Screen: 8.5 inches on the Galaxy Note9, 6.2 inches on the Galaxy S21 5G. Up to 60 Hz on the Galaxy Note9, 120 Hz on the Galaxy S21 5G.
  3. Battery: 4,000 mAh on the Galaxy Note9, 3,880 mAh on the Galaxy S21 5G.
  4. Versions: owners have shared the Galaxy Note9 as 6GB | 128GB, the Galaxy S21 5G as 8GB | 128GB.

The same on both: NFC and Widevine L1.

Chipset

Chipset
Snapdragon 845Exynos 2100
Process
10 nm5 nm Samsung
CPU
4× 2.80 GHz Kryo 385 Gold
4× 1.77 GHz Kryo 385 Silver1× 2.91 GHz Cortex-X1
3× 2.81 GHz Cortex-A78
4× 2.21 GHz Cortex-A55
Top CPU speed
2.80 GHz2.91 GHz
CPU cores
88
GPU
Adreno 630Mali-G78

Memory

Versions seen
6GB | 128GB8GB | 128GB
RAM type
LPDDR4XLPDDR5

Display

Size
8.5 in6.2 in
Resolution
1440 × 29601080 × 2400
Pixel density
389 ppi423 ppi
Refresh rates
60 Hz120 Hzalso 48, 60, 96
HDR
HDR10, HLGHDR10, HDR10+, HLG

Battery

Capacity
4,000 mAh3,880 mAh

Cameras

Back camera 1
12.2 MP4032 × 3024 · f/1.5 · 4.3 mm · OIS12.2 MP4032 × 3024 · f/1.8 · 5.4 mm · OIS
Back camera 2
—12.2 MP4032 × 3024 · f/2.2 · 2.2 mm
Front camera 1
8 MP3264 × 2448 · f/1.7 · 2.92 mm10 MP3648 × 2736 · f/2.2 · 3.3 mm
Front camera 2
5.2 MP2640 × 1980 · f/1.7 · 2.92 mm7.1 MP3216 × 2208 · f/2.2 · 3.3 mm

Megapixels are what Android reports to apps. Many phones combine pixels by default, so the advertised megapixels can be higher.

Connectivity

Wi-Fi
—Wi-Fi 6
6 GHz Wi-Fi
—No
Bluetooth LE Audio
—No
NFC
YesYes
UWB
NoNo
USB host
YesYes

Software

Android
Android 10Android 15
UI
—One UI 7.0
Released with
Android 8.1Android 11
Widevine DRM
L1L1

Sensors

Sensors
41 sensors44 sensors
Galaxy Note9 full specs Galaxy S21 5G full specs

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From phones shared with the Device Info app · updated October 2026 Hardware specs only. No personal data. Privacy