The 17" panels (hi-res LED backlighting) are very different than the 15" panels. In general they seem whiter and with a tiny bit of blue or red versus the yellow of the 15". The 17" hires is also brighter than the 15" and doesn't show color shift until at a greater angle than the 15" display. The non-hires panels aren't LED and therefore aren't directly comparable to the 15". These seem pretty much the same as the earlier two revisions of the 17" MBP.