how is HTC cell radios compared to a blackberry?

I run a BlackBerry tech support and training business, however I just switched from the big red PIMA VZW back to AT&T. I would assume that they would be about the same. I know that I didnt have issues with signal on my BB and with this device (Inspire) I have 4 to 5 bars.

 

My att phones almost always show alot of "bars", but I've noticed that my Blackberrys hold on to a particular network type and tower amazingly well. My HTC phones don't hold onto the particular tower as well, but have always handled "hand offs" better than most in my experience