Man JVG is worlds better than Mark... Jackson living off one catchphrase as a commentator (though he has toned it down with overusing it) but he's just dull and cliché. At least JVG has some banter and life, he's gotten better in the recent years IMO whereas Jackson has gotten worse.
I can't find the clip but during the Finals Breen, JVG, and Jackson were bantering about their own commentary crew. Mark said "We can do this job with only two commentators" and JVG said "We know who they'd choose"

It can be read both ways. JVG saying they'll choose me because I'm just better at my job // JVG saying they'll choose Mark because he's a company shill.
I like to think the former, but obviously Jackson has the last laugh because JVG was canned. ESPN is only good for their boxscore-checking these days, I hate the narrative driven talking-heads that attempt to be louder or more hot-takey than the other.