Replying to Difference grey polarized/dark grey (crowbar)

I was wondering about the difference between the grey polarized lense and the dark grey lense for the oakley crowbar goggle. is one of the two more transparent (so that u can see the eyes and everything), or are they both the same? because I want to have them super mirrored so that you can only see yourself when you look on the goggle and not the person which is wearing it...get what i mean? sorry for bad english ;)

also, can somebody tell me which lense she's using on this picture? polarized grey or dark grey?
http://b.vimeocdn.com/ts/857/270/85727091_640.jpg