From the sound of it, I give the nod to Resistance 2.
8 player Co-op
Seperate co-op campaign
60 Player online
BUT! (Big but)
We still have to wait and see how it is implemented and executed. Sure, it sounds great, but we have to see if it plays the same.
BTW, I never really like Gears online except for co-op campaign.

obviously resistance 2, just like resistance was better than gears of war.

Apples and oranges.

I say, wait until about 6 months after release and the game with the highest sales/players ratio wins?

Nah, that makes too much sense. I say we have a flame war.

Resistance 2 with its no mic 60 player no one knows what the hell they are doing fest or gears or war 2's tight and compelling 5 on 5 with everyone communicating........... theres only one clear winner here

Gears of war 2

More is not always better, even Left 4 Deads online play will eclipse resistance 2's online play

Hey, can I tell you in November?

You haven't been playing Resistance. I have. I'm telling you right now You have no idea what you're talking about. And if you really want to you can play 5v5's or 30v30's. Now please, tell me options are bad.

its compelling eh?

And Ronster, I am not homophobic, but your post sounds extremely homosexual.

"gears of war 2 tight and compelling 5 on 5  with everyone communicating....."

Lol. Ok I got a good laugh out of that. Ahh it feels good to be immature again.

Number of players means nothing--the first Gears' multiplayer beat the pants off the first Resistance, when it had 8 players to R1's 40.

I say Gears 2, because I like its' premise of intimate battles where every single team member's life is vital--in the main game mode, if you die, your 5-man team is one man short until the next round.

Also, although this isn't a knock against Resistance itself, people actually talk on Xbox Live. When I play on PSN, it seems like a headset is more of a peripheral than an expected piece of the online experience. I guess it's because Microsoft includes a headset with the 360, but it really does make team-based games like this more fun.

Edit: It must be said that I'm not knocking Resistance 2 (I don't even know that much about it), I just prefer Gears' general play style.  The coop looks pretty great, though.

Question though: Do we know how many players R2 supports for coop on splitscreen?