Twilight has an obvious win here! All Sapphie is a puppy, while on the other hand, Twilight is the freaking core of magic; the bridge of Friendship; student of the most magical sorceress ever.
And then on Twilight's side, she has 5 other cores of magic with equal power, plus the two rulers of the two most important objects ever; the sun and moon. Those puppies and kitties haven't got a chance.
Then again they're ponies, which in reality weigh much more that puppies/kitties so even if their magic levels were equal she could easily bring out physical power.