The ponies in this image are the same in the "Off to the Lab" commission. The only difference being that in this image, Wing is known as KCW or, Kitty Colt Wing.
The story about said young colt is as follows, quoted from Skype:
"Once upon a time, in the mythical land of Equestria, a laboratory accident sent the pony known as Wing back into the realm of his youth. For some reason, he donned a pair of cat ears and paws, and set out to discover the true magic of friendship. He found it in his perch, Aiden, and the pair went on a glorious adventure to spread art trolls and joy."
There's a lot more that goes on beyond this little schnipit but it does describe it well enough :3.