If you look closely there are some differences. The pose is the same but the curvature of the body and stuff is different. I think she just referenced the pose and was able to duplicate it very closely. Her point in the piece was for it to be a scott pilgrim/pony crossover, so it's not farfetched for her to imitate an original piece and for her to make it her own. There are many tracers on dA, but I don't believe that this is a trace.