This Italian website has some extreme close ups of the new PW display vs older Pearl e-ink display. It's hard to tell exactly but I gotta say even though the ppi is the same, the font looks better and seems to pop a bit more.
http://www.eeevolution.it/e-ink-carta-specifiche/
Ignore the totally clueless interviewer, "so you can read with this in the dark?"(he asks this with the light fully up!) and check out 1:15 of the video linked below. The screen looks to be much lighter with no front light up than the darker coffee cream color of PW1. Should be better contrast.
http://www.tbreak.ae/features/look-a...perwhite-video