The 270c and 280c display are identical units.

I don't have a Duo 250 with which to compare my 270c, though I do have a PB180 and the screen on it is indeed a work of art. However, the early Duo active matrix colour screens are also really something, and look more akin to the gem-like screen of a Compact than they do to later colour LCDs — apart from the current crop of screens. They are actually smooth and glassy, like a MacBook's.