The 622 does not have a "HD" next to a p[rogram when you are looking at the guide. Some HD channels dont always show HD, for example A&E and TNT. When you hit "guide" on the hr20, EVERY program that is actually broadcast in HD has a orange HD next to it.
You see this HD logo just in the guide, you don't have to select the program, nothing. Its especially helpful when scrolling through locals so you know whats in HD and what isnt. The All HD guide on the 622 is useless.
The 622 has NOTHING like this.