Res2 > Gears 2; for your $60.
Having played both games i find Res 2 much better.
Gears 2 has more badass cut scenes.
Res 2 has a weaker story in single player, but the intel documents is really where the story is at....however intel documents are a bad way to PRESENT your story....so Gears wins in single player/single player story. But the whole love story of gears 2 is lame!
continueing on...
Gears 2 has a much weaker MP. They have Horde mode and their 5v5. Its pretty much the same as b4 but with Horde mode.
Res 2's coop is an addicting TF2/WoW like experience. The 60 mulitplayer has many game types to play from. and a typical rank match is 10 vs 10.
Theres just no comparision of these games in MP...Res 2 gives you more options, better game play, and something new for the MP experience.
Mechanics
This is where I believe Gears 2 fails. Everything about the first gears that was a pain in the ass is still a pain in the ass.
1. the run button and take cover button are the same button. when running down a hallway you might take cover by accident 25 times.
2. Taking turns while running is hard.
3.The crosshairs are still large circles for most guns. I am not a fan of the huge circle crosshairs, it feels so inaccurate and annoying.
Now res2 is not perfect either...
1. Single player campaign is a learn by death experience
2.Their cover system is DUCK
just want to point out that Res 2 has customiziable controls...not sure if gears 2 does but that would be nice.
Overall I feel that Res2 has the edge because they fixed alot of issues people had with the first game(ie. health system, enemies looking the same, etc. etc.) and Gears 2 feels more like an expansion pack than a sequel. I was excited to play gears for the first time this past week however the gameplay was soooo much like the first that I just got to bored to fast.
I guess my point is that IGN did a good job with this vs video because they were honest and said the game they thought was worth your $60 if you could only buy one. This and the fact that they gave res 2 and gears 2 9.5's are the first time ill agree with IGN since the epic fail of GTA4's 10.