It was joe rogan and lou dibella. i'll give a brief summary of each point brought up.

Rogan: mma (UFC) commentator
It's more exciting (defended submissions as exciting)
It has state sanctions and it incorporates more fighting styles
It is essentially they sport of real fighting
Said boxing is unrealistic as a sport because when two people fight they wouldn't just fight standing up (people don't play basketball when they're pissed at each other either wtf does that matter?)
Rogan named fighters such as whittaker and toney and said that their soulder rolling techniques are not quite garabge im not really sure how to word what he said but he said something along the lines of it not being an applicable talent in the real world of fighting (again why does everything have to be useable in fighting for something to be a real sport?)
Said that boxing won't have anymore famous stars outside of the ones that are already famous now

Dibella: Boxing promoter
Mma is human cock fighting
Said that rogan can't be a real boxing fan because of the way he bashes the sport
Complained about the way ufc markets by showing bloodshed in their adds to which rogan responded hes not in control of advertising (nascar shows some wrecks at times and nba shows hard fouls as well as baseball showing those devastating home plate slides so the advertising angle isn't a good one to take imo)
Said that mma will only maintain its popularity as long as young white males continue to be interested in it
Said that mma will never overtake boxing because boxing messed itself up and that boxing can fix itself just as well
Also said that UFC is as good as it gets and everything else is garbage.