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!"
I beg to differ, "-_-" (comment #2). I'm from the Philippines, and when PDAs were new here, lots of people got away with cheating. They'd pretend to use the PDA as a calculator, switching to their notes when the time was right. :-) People still get away, even if we have one of the highest cellphone usage rates in the world, simply because our older teachers don't realize the capabilities of today's smartphones/PDAs.
So I guess the technology generation gap applies here too.