Ignore the bars - they are mostly meaningless. Focus on actual reception versus another phone. At minimum, ancedotal reports on performance in known difficult areas in comparison with other "known" phones will be helpful to those who are specifically interested in radio performance.
I can go into a "field test" mode on my Motorola phones, and pull up a debug screen on my WM phones. Both let me see the actual received signal strength (RSSI) along with the SID, radio band, and channel among other things. I Googled and found system calls for seeing the RSSI, but I didn't see any apps. Is there a built-in function to see this information on Android or the stock phone app?