Based off real world results, I might be a good candidate to answer your question.
In the time where I've worked I've owned a few vzw android devices. Its also interesting that outside the building of where I work we get great coverage. Step inside of our concrete building with limited windows and things get interesting.
How I personally compared the reception of phones is simply by streaming Pandora and comparing how many times it drops streaming in an hour.
Here's the list of phones I've owned in order of worst to best in signal reception and a number from 1 to 10:
Charge on 4g - 2
OG Droid - 3
Droid x - 5
Continuum - 6
Charge on 3g - 8
Bionic - 10
I also owned a Xperia for what its worth but its not a moto or Sammy device so I left it out. If curious its a 3
So anyway, I sold the bionic and reactivated my OG Droid last week for a week, and the girl friends old continuum this week. So those numbers are fresh, and would reflect additional cell towers in the area. Given performance no changes from when I first started working there till now have happened.
On an interesting note, with 4g, the charge sucked. It couldn't maintain connection for more than two MIN at a time. With the Bionic however I could stream Netflix or youtube all day inside the building. NO phone could do that, mine or any one's on any carrier. Everyone was jealous. Most phones had trouble just streaming any music service... Rdio, Pandora, Slacker, or iheartradio.
Hope this helps.