My friend has a Pearl and I put them side by side face up. They look very close to the same size, though I don't know the exact dimensions of each.
EDIT: From the
BlackBerry website for the Pearl 8100:
- 4.2" (Length)
- 1.97" (Width)
- .57" (Depth)
- Approximately 3.1 oz (Weight)
And from
Phone Arena for the CDMA Touch Diamond:
- 4.0 x 2.0 x 0.6 inches (101 x 51 x 14 mm)
- 4.1 oz (115 g)