Oppo A91 vs Xiaomi Redmi S2

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

  A91:

  OLED

  Redmi S2:

  LCD

• Width

  A91: 4 mm narrower

  A91:

  73.3 mm

  Redmi S2:

  77.3 mm

• Screen diagonal

  Redmi S2: 0.41 in smaller diagonal

  A91:

  6.4 in

  Redmi S2:

  5.99 in

• Chipset

  A91:

  Mediatek MT6771V Helio P70 (12nm)

  Redmi S2:

  Qualcomm MSM8953 Snapdragon 625 (14 nm)

• Rear camera layout

  A91:

  Quad

  Redmi S2:

  Dual

• Release year

  A91:

  2019

  Redmi S2:

  2018

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. A91

   Height:

   160.2 mm

   Width:

   73.3 mm

   Depth:

   7.9 mm

2. 2. Redmi S2

   Height:

   160.7 mm

   Width:

   77.3 mm +4 mm versus A91

   Depth:

   8.1 mm

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. A91

   Screen diagonal:

   6.4 in

   Aspect ratio (height:width):

   20:9

   Approximate rectangular screen area:

   98.9 cm²

2. 2. Redmi S2

   Screen diagonal:

   5.99 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   92.6 cm²

A91 has approximately 6.8% more rectangular screen area than Redmi S2.

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.