This is an in-depth article on the different types of screens. The author really seems to know his stuff on point.
HD Super AMOLED versus Retina Display, and other screens (Smartphones Unlocked) | Dialed In - CNET Blogs
So basically from the article they who is getting the job done right when it comes to screens --> Apple & Samsung
I hope this helps to clear up the confusion between this whole S3 vs EVO LTE debate in terms of screens.