This is way more important than people seem to realize. Strength, speed, and gas tank aside, everyone knows fighting is a huge portion mental. If Jones went in scared or hesitant a split second of pause before throwing a technique could have gotten him KO'd.Jones seems to believe that he wouldn't.
I can't say with 100% conviction that he would've beaten Jones, but I'm almost certain he would've beaten a clean Jones. Like the poster above me said. Fighting is largely mental, and without the confidence of knowing he's on PEDs, he wouldn't have the same belief, and that belief is the difference from throwing everything like it's second nature, and swcidn guessing things.
I have almost no doubts DC would've won if Jones wasn't on the juice.