FWIW I bought both just the other day and used them this weekend. Both the rub and the sauce are exactly what I have been searching for. The only bad side is that I didn't think to double or triple the sauce recipe when I made it. With 7 or 8 people over for some brisket and pork it didn't last long at all, lol.
so in summary, buy them both! you won't regret it.