A ball might as well be a slightly upgraded college tbh (notice that I didn't note High A). Don't feel like we're going to learn much about either until they reach AA and play there for a bit.
The problem however is the next level for us is the offensively challenged FSL. So the best route might be to give both a month in Rome, then check back. As long as they aren't terrible in A+, I'd probably go ahead and send both to AA next year to start.