Xm8 and Xm8 Advanced

It depends on your style of play, really.

The XM8 normal is better for one-shotters, simply because the scope is semi-auto rather than 3-shot, like the XM8-Adv. However, the XM8-Adv. is better for Rushers and No-Scope one shotters, because it has the +5 ammo (35/105), and the scope on it has a 3-shot burst function which is good for "long range rushing" (accuracte rushing, basically).

On the grounds of power, reload, and style, the guns are pretty much the same...except the XM8-Adv. looks like sexii cheese. Mmm. Cheddar Guns...

Well...I like cheese.
So i'll go with the xm8 adv on this one. :P

same thing. not worth it. cept the nice look. both scopes are bad.

Dude it's a cheesy XM8, what more could I want