I cannot speak to Marion vs his other school, but I just wanted to chime in about the sport vs no sport. My son had to make a choice about whether or not to play his sport in college, or go to a school where he ultimately would be playing at the club level or not at all. He chose the school where he would have the opportunity to play his sport (recruited). That is not the main reason he chose the school (SMC and he wanted the life style). To make a long story short...his sport was his passion in high school. In college he discovered he was not as passionate about it, that there were other things that he wanted to make a priority, such as ROTC activities. After one season on the team, he chose not to play next year.
He has many platoon-mates who played a sport in high school (most of them wrestlers or swimming), who chose not to go out for the team in college. He also has platoon-mates who chose to play their sport .
My thoughts to you would be to have him make his decision with wrestling OUT of the equation - which lifestyle does he want, what about a major and the opportunities at each school for that? Investigate whether or not the scholarship school has wrestling as a club sport, or if he could be a "walk-on" for their Varsity team and try out. Have him make a pros and cons list for each school. Go talk to the school, specifically the wrestling coach if you can. They are usually more than willing to talk to you - make sure they know you only have 30 days to make this decision.
Tough decision for a kiddo to make at this age - go where he can play the sport and give up the scholarship, or go with the scholarship and possibly not wrestle. Good luck, and I feel your pain!