-Resistance looks too much like a cookie cutter shooter. Gears lived up to its creators name. For some odd reason the Resistance games have always struck me as just average even after playing the first and looking at the build of the second game. It was Epic just watching all of that mayhem and glory in Gears (Straight out of a Sci-Fi movie). I've gotten bored with the same old stuff and I like moving onto something new. It's like how I moved on from Quake to Unreal.
-The locusts look far better than those things you call aliens in Resistance 2. First of all if you're going to have Aliens, aren't they supposed to be more intelligent? They are like Zombies on crack in those videos. Even the lower ranked ones.
-You can relate better to the protagonist in Gears.
-In Resistance you can clearly see that they stole the revolver from Gears 1. That Hammer of Dawn in the multiplayer was f'n beautiful. I cannot wait to clash with people in that game.
You can't really compare a FPS with a TPS.
KZ2 will own Resistance (In the FPS war this year), even though I doubt they compare at all to the shooters on the 360.