I haven't tried the Damselfly, but I ride the regular Fly. The Butterfly is too wide for me (chafing and sliding forward) but the Fly is perfect! It's similar in padding to the Butterfly (a tad less) and it's narrower. I actually have the "Fly for Cure" because I like the smooth finish (and the pink ribbon).

http://www.terrybicycles.com/detail....tem_no=2123941

I have also tried (and liked for up to about 50 miles) the Falcon Y. It was extremely comfortable and super light...but wasn't quite enough padding for the LONG rides. If you don't ride distance, I highly recommend it.

http://www.terrybicycles.com/detail....tem_no=2156800