Aside from what I said before, I thought of some things (I said before they were cool, folks, don't think I'm being overly critical):
-Madlax has much lighter skin, right? Actually, I think they both do. And fairer hair.
-Mirielle is shaplier. She has thinner legs and waist and bigger breasts. I think she has a gold buckle as well. Her hair goes midway down her back, too.
-I can't tell what they're doing with the guns. Are they holding them sideways? If so it kinda looks like the handle is on the weong side.
I don't like Noir. I'm told it really goes uphill after the first DVD, but episodes 1-4 did absolutely nothing for me.
A note on the Noir one, she has her back towards you, pointing the gun behind her. I'll dig up the forward facing sprite, which looks very much like the Madlax sprite.
That whole brightness thing could be how dark my moniter is, I'll try to lighten it a bit, I hate HP monitors.
"Say you're hanging from a huge cliff at the top of mt. everest and a guy comes along and says he'll save you, and proceeds to throw religious pamphlets at you while simultaniously giving a sermon." - Dustin G