Agreed on the Arabian! Also, I have a Standardbred X Appy and her Appy side doesn't show except that her star has begun to roan out in her old age. She does have striped hooves, but a lot of breeds do. So anyways, I could agree with the Appy side as well on this one.
As far as muscling goes, an Appaloosa is basically a spotted QH so, that would be the same.