My wife has the rezound and i have the bionic, she really wants to trade with me because the call quality is vastly different, on the bionic its crystal clear, on the rezound its kind of like your talking through a tube.
That being said, i might actually trade her, just because i rarely ever make calls on the phone, the data, and apps, part is more important to me, and the rezound does have a edge on the bionic in power. That and she needs the phone feature much more then i do.
If i had it to do over again, i might have waited for the razr maxx though, it seems to be the best of both worlds. And to those that offer up the size of the rezound over the bionic, it isnt really that different till you add the extended battery to the bionic, then its a brick, granted you add the same to the rezound and you will need a 2nd car to carry it around for you.
It all depends on what you want in the new phone, im not one that has had a problem with the bionic so i really like it, if you want better call quality, you want the bionic, if you want a little more power, you want the rezound.
Btw am i correct that all i have to do to swap phones is swap the sim cards?