Samsung Galaxy A51 vs Xiaomi Redmi Note 9S

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

• Display technology

  OLED versus LCD

  Galaxy A51:

  OLED

  Redmi Note 9S:

  LCD

• Weight

  Galaxy A51: 37 g lighter

  Galaxy A51:

  172 g

  Redmi Note 9S:

  209 g

• Width

  Galaxy A51: 3.1 mm narrower

  Galaxy A51:

  73.6 mm

  Redmi Note 9S:

  76.7 mm

• Chipset

  Galaxy A51:

  Exynos 9611 (10nm)

  Redmi Note 9S:

  Qualcomm SM7125 Snapdragon 720G (8 nm)

• Depth

  Galaxy A51: 0.9 mm thinner

  Galaxy A51:

  7.9 mm

  Redmi Note 9S:

  8.8 mm

• Height

  Galaxy A51: 7.3 mm shorter

  Galaxy A51:

  158.5 mm

  Redmi Note 9S:

  165.8 mm

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. 1. Galaxy A51

   Height:

   158.5 mm

   Width:

   73.6 mm

   Depth:

   7.9 mm

2. 2. Redmi Note 9S

   Height:

   165.8 mm +7.3 mm versus Galaxy A51

   Width:

   76.7 mm +3.1 mm versus Galaxy A51

   Depth:

   8.8 mm +0.9 mm versus Galaxy A51

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. 1. Galaxy A51

   Screen diagonal:

   6.5 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   102 cm²

2. 2. Redmi Note 9S

   Screen diagonal:

   6.67 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   107.4 cm²

Redmi Note 9S has approximately 5.3% more rectangular screen area than Galaxy A51.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

Battery capacity

Capacity is not battery life. No endurance test is implied.

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.