Xiaomi Mi 9 vs Xiaomi Redmi 4

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

  Mi 9:

  OLED

  Redmi 4:

  LCD

• Weight

  Redmi 4: 23 g lighter

  Mi 9:

  173 g

  Redmi 4:

  150 g

• Width

  Redmi 4: 4.7 mm narrower

  Mi 9:

  74.7 mm

  Redmi 4:

  70 mm

• Screen diagonal

  Redmi 4: 1.39 in smaller diagonal

  Mi 9:

  6.39 in

  Redmi 4:

  5 in

• Chipset

  Mi 9:

  Qualcomm SDM855 Snapdragon 855 (7 nm)

  Redmi 4:

  Qualcomm MSM8940 Snapdragon 435 (28 nm)

• Rear camera layout

  Mi 9:

  Triple

  Redmi 4:

  Single

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. Mi 9

   Height:

   157.5 mm +18.3 mm versus Redmi 4

   Width:

   74.7 mm +4.7 mm versus Redmi 4

   Depth:

   7.6 mm

2. 2. Redmi 4

   Height:

   139.2 mm

   Width:

   70 mm

   Depth:

   8.7 mm +1.1 mm versus Mi 9

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. Mi 9

   Screen diagonal:

   6.39 in

   Aspect ratio (height:width):

   19.5:9

   Approximate rectangular screen area:

   100.2 cm²

2. 2. Redmi 4

   Screen diagonal:

   5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   68.9 cm²

Mi 9 has approximately 45.4% more rectangular screen area than Redmi 4.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

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.