Just to chime in here...I bought the 32GB Ipad Pro for my wife. The screen had the nice white tones. I liked it so much I bought the 128gb unit for myself. Both units were the gold color. I noticed the difference right away. So I take my unit back to apple to exchange it, show them and they also notice it...another comes out, we power it on and again same yellowish tone to the whites. All the units in the apple stores have spectacular white colors. They are all 32GB units and I dont think there is any problem with the 32GB units. They must be using a different batch of screens for the 32gb vs the 128gb units. Wouldnt surprise me to find out that Samsung was manufacturing the 32GB units. So after the second one comes out, I tell them no good and they bring out a third unit. For my troubles they give me a free case. I take it home and again noticable difference in color tones, at least to my eyes. So for kicks I go to a Bestbuy near me and try again for a forth and final time for now, again a 128GB Gold unit and it also shows the yellows only this one was a little worse, I immediately tell them im not leaving with this...refund it and they do..So I created a video on youtube which clearly shows the difference in colors. The 32GB on the left is my wifes which she is keeping and the one on the right is this 3rd unit I got at the apple store which is being returned today. For 1100.00 they better have near perfect screens...also why make the 32GB units really nice white levels and screw the guys that are buying the 128GB units. I personally emailed tim cook on this issue and have yet to hear from him...I guess I'll wait 4 months till they straighten this out...if after 4 months i buy another one..and its the same...then I'll wait for the ipad pro 2. Lol. or just never buy one.....here is the video link...
https://www.youtube.com/watch?v=IE8t11Gk1jU