It's easier to make designs on armor on a character than to make clothes actually look like clothes or uniform on a character instead of stuff painted on or stacked on in chunks (the gears look).
If Killzone builds on the detail of this single character and applies to all characters then they should look great and very real. I still think the detail in the uniform is more of an achievement than the detail in designs on the surface of the Gears uniforms.
The whole chunks of armor feel of the uniforms in gears works for the design of their gigantic characters with massive bodies very well and makes it look good in game but it isn't as impressive as clothes actually looking like clothes in a game. I always am disappointed by the realism of clothes in a game of any kind.
Thanks to Blacksaber for the sig!