The carbon blast is the only one I know of that removes all kinds of oders. If the others did that, they couldn't have scent killer with autumn scent now could they?
Basically, the carbon blast is the same as the rest, but with carbon added. While it can darken what you spray it on, it's nothing like the adds agains't it...very hard to notice, AND it DOES wash off. It shouldn't turn your car seat black as long as you don't use the whole damn bottle (why are you wearing your hunting clothes in the car???)
If your worried about the color, spray the INSIDE of your garments (that's were the scent comes from anyway)