Also,

I think a lot of us are expecting Big Boi to pull it all together with the Big Boi/Outkast sound somehow. He has set the bar that we feel any guests will only enhance what is ultimately HIS music.

The Game is known for sounding like his guests which actually takes away from him as an artist.

But I get what you are saying. They are basically doing similar things.. Collaborating with several hot guests. It's just that Game is collaborating with his peers in the rap game who are hot and have their own thing going on. Big Boi is collaborating with a lot of artists who are hot to the "Pitchfork" crowd. The effects are similar, but the demographics are different.

It remains to be heard which is more effective or not, but I think it's safe to say that around these parts, Big Boi has the better shot.