I'm pretty sure she's a mink. It's hard to see because there's glare on the photo, but I'm pretty sure that's what she is.

As for markings, looks to be split cap/stripe.

http://img.photobucket.com/albums/v6...s/IMG_6085.jpg
Partial litter of minks I had. Minks can pretty variable in color.

Now, the picture doesn't show it, but you made reference to maybe her face being two shades of color. Which is possible, seeing as minks can come in merle too. I more often see pearl merle, than mink merle..but both are pretty rare.

Usually merling appears darker, looking kind of like "rusting splotches". Lighter splotches could just be discoloration/mismarked.