Is it fair to say that Resistance 2 is Sony's Halo?

[Reasonable]

ahcheng said:

sony had make a mistake to make Resistance 2 release at the same time as Gears 2.
So Resistance 2 has a high chance flop in this winter.

you compare Resistance 2 with Halo..................
I think this is a kind of disrespect to 360 owners .

I don't see your logic.  Since each is on a seperate platform the only chance for each to affect the other is with people who own both platforms (and who only plump for one) - unless you think PS3 owners aren't going to buy RFOM2 because GoW2 is out for 360, which seems pretty unlikely thought to me...

However if you've gone to effort of buying both a 360 and a PS3 I doubt you're going to buy one and not the other so I don't even see that affecting much either.

Whatever RFOM2 sells won't be overly affected by GoW2.  And given RFOM sold over 3M and there is now a larger install base I doubt its going to sell less than at least 3.5 to 4M LTD and may sell more if it reviews very well.