Don't worry to much about the specs of different tv's. Specs don't give you the whole picture (pun not intended). Yes they might help when narrowing down your selection of tv's, but the only way to tell if it's any good or worth the extra money is to view the tv's yourself.
The biggest difference you will probably notice is in the sound. The 85's have an upgraded audio system which might be of interest to you. There might be other differences in picture processing for example but you need to view both tv's and decide for yourself.