He's definitely tobiano, but I've seen pictures of his sire and his sire definitely has splash in him. So I'd say Aires is tobiano+splash which technically is considered tovero because it's tobiano gene+overo gene. See the white and black crossing over his back? That's an indication of 2 patterns at play, plus his white stockings, which is very common in splash.
"The greatest pleasure of a dog is that you may make a fool of yourself with
him and not only will he not scold you, but he will make a fool of himself too."