Cain is a better version of Cormier, and not just a little better, a LOT better. Cormier gave Jon a good fight. Cormier is 5'11" with a 71inch reach. Cain is 6'1.5" with a 77 inch reach.
There is no reason to think Cain wouldn't beat Jones. If Jones absolutely destroyed Cormier, I would say OK, but he didn't.
This is a very good post.