Unreal Flash was alright but trouble was the terrible graphics and the fact that one of the stages has been ruined by a red screen. Armor Mayhem is different as you have to unlock stages by playing campaign and buy armour style and guns with cash. Raze, I haven't played that for some time so may as well play it now.
I like Raze the best, probably because it's the one I played first out of the three. I like the stages and the guns better than Armor Mayhem. I didn't like the not-so-good graphics on unreal flash either.
I like Armor Mayhem the most, since you have lever editor for it, and I just love making maps! Raze comes on 2nd stage, since its just good deathmatchgame Unreal flash 2007 is also nice, because weapons have a secondary firing style, and yóu can have 2 weapons at once at use, but one map is skrewed and you have lesser customising (about characters).
I don't like wiew distance in Raze, which is much better in Armor Mayhem, i like guns in AM but i don't like lack of character modifications, you really can't tell the diference from those buying armors when you are fighting, so that is a + for Raze
Three words do not say anything, but anyway this topic isn't going anywhere, every game has it's fans that will say that their game is the best, so this is pretty much like football rivals, you'll never get objective oppinion.