Difference is also, he's actually playing the game and is actually emotionally affected by what he's suffering through. That makes it much more convincing.
Actually I would go much madder than him at times. You don'T want to watch me play a game and notice a minimal bug having big consequences (a unit/you getting stuck somewhere messing up a tactic/getting you hit and killed by some boss). I'm on my period when that happens.
Also AVGN is pretty timid. His narration is pretty normal, he just uses expletives sometimes. He doesn't scream like a marketeer or move his arms around like he has to control traffic in Saigon.