Gameinformer: Resistance 2 unvieled. Simply awesome.

[Mummelmann]

"Fi fai fo fum, I hear Insomniac's war drum"
Seriously though; I think Killzone 2 and Resistance 2 will be vastly different both gameplay wise and in visulas and art.
Think Doom vs Half-Life, that's a tad more suitable imo.
Then again, one could remove the "vs" alltogether, considering these are two platform exclusives that will hardly harm each others sales... I think they'll make a collective effort and up hardware sales in a big way, along with the "the big three" we're waiting for (FF, MGS, GT).