They were in the film for so little that I honestly can't decipher between. Yet another terrible example of character development. They might as well have not been in the film.
I like all three of them, but I vote for Arcee since I like the front end of the bike on her shoulder, it looks neat. And her motorcycle mode is the coolest of the three. Still would have liked to see more of them. At least they got more screen time than Sideways & Jolt!
I voted for Arcee but, now that I think about it, I think Moonracer looks pretty kickass in my opinion.