Yep it is def about the horse presented in front of you, you are right!
I just want something solid, sound, and good brain / personality, this horse seems to have it. I only passed on this breed previously because of conformation as many I see are very DHH looking (awkwardly long necks and not ideal movements for riding as you mentioned more for driving). This one I did not even suspect as a DHH cross. He is not built like it at all. He is 5 years old, just started under saddle this year by a professional (not amish) that trains Dressage and low level jumpers. Never broke to drive or anything. Movements are very nice, similar to a Clyde X.
My only concern is how much sport horse is in the horse’s blood, or if it will be too heavy/drafty for jumping over 1m down the road. It is hard to say without a DNA ancestry report lol. But from what I have seen so far this horse is very athletic yet level headed, and I quite like him. I do want to learn more about the breed before getting my hopes up though. I do not know anyone else with a DHH or DHH X.