You might not see the difference particularly because the screen on the rezound is alot bigger and when you have a bigger screen you will need a bigger resolution to get great quality. Like apple does. that little teeny screen they have, while boasting about there ppi. It's fine and dandy. But when you have a phone like the rezound that has a bigger screen and slightly better ppi, it's time to step your game up. some folks wont notice the difference because they swear they have the sharpest vision in the world and everything they see through there eyes are how they should be. So many people (including myself) lie to themselves about needed glasses.
I'm not saying you are in need of glasses or anything, I'm just saying with everyone throwing resolutions stats and ppi around, it truly comes down to how your own eyes view the picture. Some people like brighter vividly enhanced screens. Some people like the duller, easy on the eyes, but still get the sharp color separation look. In the end the screens are still subjective. I wear glasses now. I have the Dinc 2 and now the rezound. Had the bionic as well. Played with the nexus prime for a while. all great screens. But there was always something about HTC screens that were different. Not as bright, but they had a very solid look. Other screens looked good as well, but a tad bit saturated and glowie. You know what I mean?