If you want to draw a rigorously serious comparison you need to mathematically compare audience sizes and base rates. Don't know how it shakes out but my money is definitely on sports, if for no other reason than that video game fans don't congregate in huge arenas with heavy drinking as often as sports fans do

Completely agree. Though I can see a future where gaming gives it "competition" in this area. Especially with esports on the rise. Multi million dollar prizes and loyalties forming around these teams.