Farmville is interesting. I like it as an anthropological study, as Kessler related it to one the last Internal Affairs, but it is rarely that funny or outwardly entertaining.
Fear Gauntlet on the other hand is an awesome idea, featuring tons of awesome (and a few not so awesome) games, Kessler's OOOOHHHH NOOOOOOs, and scary undead dogs jumping through windows so it's no contest really. Spook Look FTW!
I absolutely love the Fear Gauntlet, Matt and Steve are hilarious when playing games together. Steve sounds like he's having a heartattack with every encounter, and Matt is just plain bad at videogames, which only adds to the tension.
Not to say I don't love the Farmville stuff, but the only really memorable parts were the sabotage and the investor check-in episodes.
Fear Gauntlet has been more entertaining than actual Giant Bomb content lately. That's probably just because of the lack of interesting releases, but even the joke quick look on the Jerry Rice football game wasn't as funny as I had built it up in my mind ever since watching I love Mondays.
Fear Gauntlet Playlist: http://www.youtube.com/therealgiantbomb#p/c/323C2006B080BC7A/0/-tvmXmFo9cI
Betting The Farmville Playlist http://www.youtube.com/therealgiantbomb#p/c/B489A3DB245301C7
Fear Gauntlet by a country mile. I started playing FarmVille and at level 28 (Where the guys are getting now) I just completely lost interest and stopped playing, think the Betting the FarmVille videos are suffering like this, you just realise there's no point.