Compare Xiaomi Mi 9 vs. Samsung Galaxy A51

	Xiaomi Mi 9	Samsung Galaxy A51
Specifications
Brand	Xiaomi	Samsung
Model	-	-
Release Date	March 2019	December 2019
Operating System	MIUI (Android 9.0)	One UI (Android 10)
Dimensions
Size	157.5 x 74.7 x 7.6 mm 6.20 x 2.94 x 0.30 in	158.5 x 73.6 x 7.9 mm 6.24 x 2.90 x 0.31 in
Weight	173 g 6.10 oz	172 g 6.07 oz
Screen
Size	6.39 inches	6.5 inches
Resolution	1,080 x 2,340 pixels	1,080 x 2,400 pixels
PPI	403	405
Features	OLED	OLED
Cameras
Rear	Triple camera 48 MP f/1.8 Wide 16 MP f/2.2 Ultra Wide 12 MP f/2.2 Telephoto	Quad camera 48 MP f/2.0 Wide 12 MP f/2.2 Ultra Wide 5 MP f/2.4 Macro 5 MP f/2.2 Depth
Front	20 MP f/2.0 Wide	32 MP f/2.2 Wide
Storage
Memory	6 GB 8 GB	4 GB 6 GB 8 GB
Fixed	64 GB 128 GB 256 GB	64 GB 128 GB 256 GB
Removable	-	microSDXC
Processor
Chip	Qualcomm Snapdragon 855 SM8150 Octa-core processor 7 nm	Samsung Exynos 9611 Octa-core processor 10 nm
CPU	1x 2.84 GHz Kryo 485 Prime 3x 2.42 GHz Kryo 485 Gold 4x 1.78 GHz Kryo 485 Silver	4x 2.30 GHz Cortex-A73 4x 1.70 GHz Cortex-A53
GPU	Adreno 640	Mali-G72 MP3
Battery
Capacity	3,300 mAh	4,000 mAh
Features	Fast charging 27W	Fast charging 15W
Removable
Connectivity
5G
NFC
3.5 mm Audio Jack
Micro USB
USB Type-C
Lightning

Xiaomi Mi 9	Samsung Galaxy A51

Released in March 2019. Features 6.39 inches screen with a resolution of 1,080 x 2,340 pixels and 403 ppi. Octa-core processor Qualcomm Snapdragon 855 SM8150 with up to 8 GB memory and 256 GB storage. It has 3,300 mAh battery.	Released in December 2019. Features 6.5 inches screen with a resolution of 1,080 x 2,400 pixels and 405 ppi. Octa-core processor Samsung Exynos 9611 with up to 8 GB memory and 256 GB storage. It has 4,000 mAh battery.
Head to Head
Probably better rear camera Probably better front camera More processing power (12%) Battery with better fast charging (44%)	Probably more versatile rear camera Much better battery capacity (18%)

Compare phones side by side