Originally Posted by DrMoze
No, no, no. The 300 has a slightly whiter background and slightly better contrast than the 505--not a big difference, but definitely in favor of the 300. And the number of greyscales has nothing to do with text contrast. The edges of individual characters are sharper on the 300 than on the 505. And this is fact, not a matter of opinion.
I agree the white is whiter, but the contrast is less on the 300 than the 505 based on my looking at them side-by-side at the Sony Store yesterday. (also true in comparison to an Astak 5" Pocket Pro). The Sony 300 Screen and the PP Screen are the same contrast-wise.
You are right the number of grayscales had no bearing on overall contrast.
The character edges may be sharper due to the smaller pixels of the 300 display since both are the same pixel dimensions.