I feel like as soon as the CMC get their cutie marks (hopefully next season) they'll manly be jealous of the trio's amazing talents and Scootaloo's flying and Sweetie Belle's magic ability,realizing they're just plain Earth Ponies (not including AJ or AB).
Those eyes make them really beastly. It's like they're each a Chrysalis. Works particularly well in contrast with the rather soft and pleasant appearance--I guess that's actually the way it is in Equestria with them, and if that was the intention, then it's perfectly successful. I love their manes with how smooth and flowing they are, and particularly the loose strand sticking out of Silver Spoon's. Also, the expressions really fit them--Diamond Tiara's face is acidic and mocking (reminds me of someone I know so very much), while Silver Spoon, while appearing condescending, is a little bit less unlikable than her, as in the show Silver Spoon is more of a follower and doesn't seem to mock and bully purely out of deplorable enjoyment, but to impress and gain favor with Diamond Tiara. At least so I gather. Additionally, the choice of background colour is rather fitting and suits the piece well. A very nice piece of work, maker.