I've just had the tbolt for a few days and here are my thoughts so far:
Pros of Fasinate (vs Tbolt):
- lighter, smaller
- brighter, better looking screen (altho I think the tbolt's screen is not too bad)
- easier to root! and odin makes it a breeze!
- layout of the vol & power buttons and charger location
- I like that with TW you have the gps, bluetooth, wireless and data controls in the drop down menu, sense doesn't have that.
- apps are more compatible (getting FC's on a few apps and some apps don't even work with tbolt yet, but I'm sure that should be resolved soon)
- battery cover is easy to remove, I think I almost broke the tbolt battery cover and power button trying to remove it
- swype! (altho you can get swype beta or the evo swype put on the tbolt)
Pros of Tbolt (vs Fascinate):
- 4G is quick!
- phone is smoother on stock than fascinate was on stock
- GPS works, locks within seconds as opposed to a minute or so
- better signal
- sense ui flows better for me, looks like launcherpro which is what I used on the fascinate
- more dev support (can't wait for cyanogenmod!)
- more room around the power connector so any power cable can plug into it.
- kickstand! (altho I haven't used it yet...)
- LED light
- front facing camera
some other items to keep in mind:
- battery life on the tbolt, seems to me, the same as it was on the fascinate so far. just leaving it on overnight, both phones would drain about 10% overnight. I haven't had any issues with the tbolt draining power for no reason yet (knock on wood).
if vzw hadn't sent me an offer to let me get the tbolt for $150, I wouldn't have gotten it. There was no way I'd pay full retail for this phone (nor any phone), especially since it is just a minor upgrade and there are much nicer phones coming on the horizon. What I wanted was a phone that would be supported by the manufacturer and vzw and also by the devs, cuz let's face it, without any releases or leaks from the manufacturers, devs hands are somewhat tied.
I'm still trying out the tbolt, and not entirely sure if I'll keep it yet, but it's making a good case for itself. there are things I like about it and things I don't, so we'll see in about 10 days.