The guy on the right is from Dawn of War, which is a Warhammer 40K game.
For those that don't know, Warhammer 40K is basically like that "Starwarcraft" flash that someone put up a while back, except the franchise is, in fact, OLDER than Blizzard itself. One can even say that Blizzard copied from Warhammer and Warhammer 40K.
Oh, and I think the comic has a valid point. As far as I'm concerned, SCII looks like SCI with a slightly different graphical coating. Yeah, I'm aware of the phrase "If it ain't broken, don't fix it" but they seriously need to get with the times to catch up with games like Supreme Commander or Dawn of War.