As to suitability for eventing vs. hunters, I don’t think it depends as much on his conformation as it does on his movement and disposition. At the lower levels of either discipline, conformation is seldom going to be the factor that differentiates. From the pics, I don’t see anything that would suggest more suitability for one discipline vs the other.
One thing about eventing… many (non-pro) eventers don’t worry as much about placing as they do about finishing. To finish, you must have a horse who can handle all three phases - able to deliver a decent dressage test, go bravely across the country while almost always jumping all the jumps, and managing the stadium without leaving a trail of poles behind.
Beyond finishing, at the lower levels of rated events, if you want to place well in your division, you probably need to go double clear in cross country and have at most a rail in stadium. If you want to win the division, you need to have an excellent dressage score as well. At the lower levels, the dressage does not need to be particularly fancy, but to be at or near the top of the scoreboard, the horse should display correct fundamentals - be supple, relaxed, obedient with correct gaits - and the rider needs to be able to ride a very accurate test.
Bottom line: the ability to put the complete package together and be competitive as an eventer depends largely on the horse’s mind and training. The same is probably true for hunters - with the main difference being that in the more competitive hunter divisions, quality of hunter type movement and quality of jump are both more important and more subjective. If your horse has a daisy cutter trot and the stride to be able to lope down the lines with a quiet, relaxed demeanor, he may be more valuable as a hunter.
