Whoops! I probably should have specified this in the description, haha. Mrs. Faust did say that Rainbow Dash has the personality identical to Firefly, but it's really Firefly's colour scheme that I enjoy over Rainbow Dash's, if that makes any sense.
Pinkie Pie is actually modeled after Surprise but her wings were given to Fluttershy instead. I've been reading all this stuff lately about the character designs here on deviantart & that's what I learned! >.<