Exactly you goof with your double standards when facts are thrown in your face. I'll compare all day. First off McMann didn't lose to Gaff or Shayna. But DC not only lost to Jones but he got OUTWRESTLED. DC is an Olympic Wrestler, Jon Jones wrestled at a community college!!! After talking all that jazz about taking Jones down DC got outwrestled by a JR College wrestler. Those are the facts.
The thing is Olympic wrestling is a different style than american collegiate folkstyle.
Similar in many ways but with very different scoring rules that vastly change the tactics of the match.
Jones only wrestled folkstyle with emphasis controlling your opponent, mat work, and allows you to perform several takedowns, returns, reversals that would pin yourself in freestyle.
DC while having a folkstyle background spent a decade perfecting his game for international competition.
Its pretty clear Freestyle isn't as effective in MMA because even guys like Yoel with explosive TDs have showcased weaknesses from his freestyle mindset. Yoel is doing better but there were points he was exchanging TDs and standups with guys much less skilled them him In his mind he probably never considered what to do in positions you'd never find yourself in a freestyle match.
Greco is even a stranger beast as the ground work in that sport consists of more or less turning oneself into a log until its time for a stand up. Although Greco has a lot more clinch work than other styles.
In summary a guy with a great folkstyle game probably has a better all around skill set than a Olympic freestyle wrestler, and might beat him under a rule set to his advantage, but the freestyle wrestler probably has a few skills he is amazing at that are more important to his sport and would win under his rules.
I'd say folkstyle is closer to mma grappling than either international style, but still not 100% analogous.