>barbecue sauce.. aren't those variants of ketchup

Dont go around the carolinas saying something like that! You are likely thinking of Memphis style barbecue sauce, which is often katchup based, where the carolinas use a vinegar based sauce.[1]

I'm not sure if i would call 2 cups of vinegar and some seasoning[2] ketchup

[1]https://en.wikipedia.org/wiki/Barbecue_sauce#Variations

[2]http://allrecipes.com/recipe/58486/eastern-north-carolina-bb...

Yeah. Barbecue sauce in particular gets used in the same situations as ketchup, and is usually also tomato based. I feel like ketchup is almost just synonymous with Heinz. When I want ketchup I basically am looking for the taste of Heinz, and if I want variety then I get something thats not called ketchup.