HTC U11 Eyes vs vivo X21

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

  U11 Eyes:

  LCD

  X21:

  OLED

• Weight

  X21: 28.8 g lighter

  U11 Eyes:

  185 g

  X21:

  156.2 g

• Screen diagonal

  U11 Eyes: 0.28 in smaller diagonal

  U11 Eyes:

  6 in

  X21:

  6.28 in

• Chipset

  U11 Eyes:

  Qualcomm MSM8976 Snapdragon 652 (28 nm)

  X21:

  Qualcomm SDM660 Snapdragon 660 (14 nm)

• Rear camera layout

  U11 Eyes:

  Single

  X21:

  Dual

• Depth

  X21: 1.1 mm thinner

  U11 Eyes:

  8.5 mm

  X21:

  7.4 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. U11 Eyes

   Height:

   157.9 mm +3.4 mm versus X21

   Width:

   75 mm

   Depth:

   8.5 mm +1.1 mm versus X21

2. 2. X21

   Height:

   154.5 mm

   Width:

   74.8 mm

   Depth:

   7.4 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. U11 Eyes

   Screen diagonal:

   6 in

   Aspect ratio (height:width):

   18:9

   Approximate rectangular screen area:

   92.9 cm²

2. 2. X21

   Screen diagonal:

   6.28 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   98.4 cm²

X21 has approximately 6% more rectangular screen area than U11 Eyes.

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.