I think it depends, gaming requires a good microphone and recording if you want a good quality video. And I'm not just talking about PC games, what about the console ones? You're gonna need an HD Capture Card if you want people to watch, and this is just assuming you have engaging commentary.
Vloggers need a camera for good quality, and they need to look good as well.
I think vlogging is generally easier; when people are actually making a good quality gaming video, and not just recording and going, then it takes longer. Especially when it comes to the editing.