The first one is a mustard based sauce. Pretty similar to a SC sauce, but a lot thinner. I'm not too keen on mustard sauces, although I did try a South Georgia sauce earlier this year while I was down in the Columbus GA area. It's a ketchup/mustard combo that was pretty good.
The Shack Attack, I've made quite a few times. I like it, but I think this is one of those sauces that you either love, or you hate. There's nothing in between.
The AR Shack sauce is pretty good too. I've varied the amounts of pepper, sugar, hot sauce and vinegar in several different batches.