Just look at this video. You will notice that when they zoom in on them both when they are shooting, the original gears has a higher res. Also, look at the effects when the alien is being cut in half. In the original gears, he actually cuts all the way through the alien. In the second gears, he arely taps his shoulder and the whole thing falls off. IMO, this is starting to piss me off and I thinkthat its bull that epic games is doing this.
edit: I also notice how when he was shooting off of the platform in gears 2, he wasnt killing anything, but in gears one, he was
http://www.gametrailers.com/player/33774.html