Having owned a T-bolt and a Charge I can shed a little more light on this, but I still would suggest going in a playing around with them. The T-bolt was nice, pretty responsive for a single core phone. Main issue I had with them, the screen (popped out don't know how) , the earpiece sounded tinny and horrible, and the craptacular battery life. Otheriwse the T-bolt was a fairly solid phone when rooted and custom rom added etc. The Charge the only good things about that phone #1 Super AMOLED + display #2 Light. Otherwise touch wiz sucks but can be remedied with a custom rom now, or a launcher. The phone was pretty slow seeing it wasnt even using a 2nd generation humming bird processor, so the processor in the Charge is 1 year + old by now. That's not really a huge issue, but the Charge really does lack in performance. I was on full flash engadget on Miren browser and the phone would just stutter and become unresponsive, hang for like 3-4 seconds. If you use the stock launcher you will notice micro stutters, and hangs like 1-2 seconds at times. Is the Charge worth 300 on contract? In my opinion no.
Now for the X2 Pros: #1 Dual core processor it is fairly noticeable when loading full flash animation sites, no micro stutters or loss of responsiveness when flinging through the screen. Games/apps load up faster and have no stutters. Is it game breaking? Until dual core is optimized 100% for Android probably not #2 Call quality for those that actually still think of the smart phone as a phone, the call quality on this phone is superb. Even when I'm driving w/ the window open and on minimal volume I can still hear the person I'm talking to, and they can hear me perfectly. Moto has always made excellent quality communication devices, good earpiece, good noise cancellation. 3# Display very crisp and sharp, very very bright even in sunlight. People complain about the Pentile display like no tomorrow, yes you can notice the pixels if you shove the phone infront of your face (but da fuq would you be doing that for?) But to be fair almost every phone you can notice the pixels in one way or another. #4 Battery life on this phone is pretty good have no complaints about it. Cons about this phone #1 Motoblur That's pretty much the only con I have about this phone, otherwise great great device.