It doesn't matter, both resist rust exceptionally well. Bi-tone will cost you a tad more at purchase though! So you can feel safe with whichever you choose.[/QUOTE
^^^ What he said. Both will rust if not taken care of properly. Given reasonable care, either will be rust free. It mostly boils down to cosmetics. Do you want a totally black gun, or a Bi-Tone?
This. Coupled with the availability of bitone I could not justify it.I think that the bitone looks cool on these guns, but I don't know if I would pay the extra money for cosmetic value. I say that now, but I can see that being different if the time came that I was looking to buy another. I do think the the OD would be a cool one to own too.