Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
@Donald
'I fail to understand why you would have a memory card slot when you've got an EIGHT GIGABYTE HARD DRIVE built in.'
So you can put more memory on it you douche. YOU CAN NEVER HAVE ENOUGH MEMORY.