Awesome inspirational dressage vid

^ agreed, the second horse looks, for lack of a better word, smaller.

They do look different but I don't know enough to say for certain. Keep in mind saying the horse looks smaller that she probably grew quite a bit as well! =]

I think its the same horse, just gotten bulkier with the training/lighter with age. Theres a set of photos on a friends FB, a grey horse gone from Prelim dressage to Medium/advanced levels, and he has muscled up quite well. I'd post the photos but I don't have her permission