I noticed in the "Boots on the Ground" Trailer quite a bit of Uniform Variety. I might go as far to say as maybe even more than in the Original Rising Storm, and its still in Alpha!
First Off: Heritage, saw some African Americans in the trailer.
Shirtless Soldiers: First guy we saw up close was Shirtless, and in the Village Firefight you can see a Shirtless VC in the background.
Helmets: Lots of different Helmet Variety. I saw a book of matches in one, some helmet inscriptions, cigarettes. A couple of guys didnt even have helmets and were bald.
This is probably just because its a different Branch, like with the Army and Marines in RS, but you can see some U.S Marines in the city wearing ERDL camo, interesting.
Could all this variety mean character customization? There is customization in KF2 after all.