Rainbow Dash is one for the heavy/curvy girls! And she looks the most proportioned of them all.....
Toola Roola & Cheerilee look like the tall skinny ones winched in at the leg joints (and does Toola-Roola's butt look like it is poking up and outta there?).
StarSong & Scootaloo look like the average (but still oddly large hooved).
And poor little Sweetie Belle, her cutie covers her whole body. And she looks like she is trying to not to get trampled by those other hooves that are the same size as all of her!
But thanks for the clarification! G3ND it is!