I know technically they're not the same.
Roy is a great grappler with a heavy top game and great BJJ who's fallen in love with his hands, specially his right, he had an iron chin and questionable cardio.
Dan is a great wrestler with a heavy top game and great control who's fallen in love with his hands, specially with his right hand, aka (H Bomb), he also has a granite chin with questionable cardio.
Both men are super dangerous and can put you away in a second, but their gameplan is so simple. Just use angles and side movements, ex. Rashad vs Henderson and Miocic vs. Nelson.
I don't know how fighters get suckered into a firefight with them which is almost suicide considering their chins.
Finally, in a matchup considering Roy weighing 225lbs vs Henderson weighing 207lbs who'd win?
Oh and I forgot, both are extremely sore losers.