Oppo A31 vs Xiaomi Redmi Note 9 Pro

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.

• Weight

  A31: 29 g lighter

  A31:

  180 g

  Redmi Note 9 Pro:

  209 g

• Width

  A31: 1.2 mm narrower

  A31:

  75.5 mm

  Redmi Note 9 Pro:

  76.7 mm

• Memory variants

  At 128 GB storage

  A31:

  4 GB RAM

  Redmi Note 9 Pro:

  6 GB RAM

• Rear camera layout

  A31:

  Triple

  Redmi Note 9 Pro:

  Quad

• Depth

  A31: 0.5 mm thinner

  A31:

  8.3 mm

  Redmi Note 9 Pro:

  8.8 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. A31

   Height:

   163.9 mm

   Width:

   75.5 mm

   Depth:

   8.3 mm

2. 2. Redmi Note 9 Pro

   Height:

   165.8 mm

   Width:

   76.7 mm +1.2 mm versus A31

   Depth:

   8.8 mm +0.5 mm versus A31

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. A31

   Screen diagonal:

   6.5 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   102 cm²

2. 2. Redmi Note 9 Pro

   Screen diagonal:

   6.67 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   107.4 cm²

Redmi Note 9 Pro has approximately 5.3% more rectangular screen area than A31.

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.