Hello, Im about to get back my 15" late 2013 rMBP from repair. I had bad spots on the screen, which looked like glares, they appeared about 3 months ago and multiplied lol ! Apple genius offered me to replace the screen, which is great. What do you guys recommend to test the new screen, I certainly will see right away if they changed it, but is there any kind of procedure to test it ? I thought I remembered that there was 2 different brand of screens, which one is better ? I was really glad of the Retina quality of my previous screen. Thanks for your input, Dimitri.