T-Mobile Comet vs vivo Y91

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

  Comet: 61.4 g lighter

  Comet:

  102.1 g

  Y91:

  163.5 g

• Width

  Comet: 19.2 mm narrower

  Comet:

  55.9 mm

  Y91:

  75.1 mm

• Screen diagonal

  Comet: 3.42 in smaller diagonal

  Comet:

  2.8 in

  Y91:

  6.22 in

• Chipset

  Comet:

  Qualcomm MSM7225 Snapdragon S1

  Y91:

  Qualcomm SDM439 Snapdragon 439 (12 nm)

• Rear camera layout

  Comet:

  Single

  Y91:

  Dual

• Depth

  Y91: 4.4 mm thinner

  Comet:

  12.7 mm

  Y91:

  8.3 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. Comet

   Height:

   104.1 mm

   Width:

   55.9 mm

   Depth:

   12.7 mm +4.4 mm versus Y91

2. 2. Y91

   Height:

   155.1 mm +51 mm versus Comet

   Width:

   75.1 mm +19.2 mm versus Comet

   Depth:

   8.3 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. Comet

   Screen diagonal:

   2.8 in

   Aspect ratio (height:width):

   4:3

   Approximate rectangular screen area:

   24.3 cm²

2. 2. Y91

   Screen diagonal:

   6.22 in

   Aspect ratio (height:width):

   19:9

   Approximate rectangular screen area:

   96.6 cm²

Y91 has approximately 297.7% more rectangular screen area than Comet.

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.