Mild - Rich chile flavor, like chili powder. A touch of heat, but not much. I like the flavor, though.
Hot - Actually, I can't tell this one apart from Mild. There's no difference in the overall taste, and the heat increase is insignificant.
Fire - Detectable heat (not painful or even uncomfortable) with little nubbins of onion and jalapeno in the sauce. I really like this sauce - wish TB would sell it in bottles.
Verde - Not very hot, green-tasting and vinegary with a sharp tomatillo flavor.
Fire Roasted - No heat at all, but an awesome sweet/smoky chile flavor that is just awesome. I mixed some with Fire sauce for a really excellent medium-heat sauce.
