Black Iridium vs Gray prizm (both non polarized)

[bigtony]

Looking at Sutros, but I found out they didn't come polarized. I want either the black or gray lens because I don't really like how the other colors look. I think the look of the glasses is flashy enough without the giant bar of color over my nose. Neither are polarized, but from what I've heard, they're the same lens except the black one is mirror coated which is supposed to help with glare despite the polarization. I'm not sure if the black would be too dark for everyday use, or the gray too light. Looking for a versatile pair that I can wear in the most conditions possible. Any pointers?