Preliminary thoughts after running it for a couple hours...
WiFi/3G hand offs were instantaneous. 3G to 4G was quicker than I noticed on 0627
GPS picked up my location in a very rural area, not by any main roads, while driving in about 2 seconds. Turn by turn directions back to my house popped up in roughly 4 seconds.
Battery life still seemed poor. Turned on 4G for about 20 minutes to test hand offs with 75% battery. After checking Twitter for a few minutes, doing the GPS test and checking a few emails I was down to 62%. Granted, I was not in a strong 4G area and was frequently bouncing back to 3G so that more than likely played a role in the battery loss.
All in all this new radio seems solid. My first instinct is to say that it's better than the 0627 radio, but it will take a few days to really make that assumption