I have just ordered a second Kindle this time a Kindle 4 however just after doing so I read a users review which mostly was comparing the screen and the view that the K3 screen seemed to have better contrast to the K4. There seemed to be a number of other people that agreed.
Now after a bit of reading it seems that it may be just variation between screens which is the same between different K3's as well but I am interested to hear of people here that have both K3 and K4's and if they have noticed any difference. I must say the K3 we got had a slightly darker screen then I expected. Still quite readable but just not quite the "like paper" I was hoping and it would be, of some concern if the K3 is darker again. Yes I know they are supposedly the same screen however it is possible that they are manufactured at a different plant or even by a different manufacturer.