I installed the Google keyboard and went right back to the stock Razr Maxx HD keyboard. There was no comparison and, worst of all, the user dictionary didn't seem to be working. I can't tell you how many times I tried to swype the word Gail and it came up Fail every single time... EVERY time. Also, the keys are smaller and darker - hard to see where you are on the keyboard. The swype "stripe" is also quite wide and obscures the keys. The Google keyboard gets a major thumbs down from me.
I have to add, though, I really LIKE the Google Calendar app compared to the stock one. Much nicer.