Coke has more fizz, Pepsi has more sugar. Whatever your bag is, I suppose, unless you care about animal rights, assasinated Columbian workers, and soforth.
Nevertheless, I like pepsi better in a can, coke better in a 2L, Pepsi better from a fountain, I don't like either Vanilla product (actually I haven't tried v pepsi, but I assume ...), Pepsi Blue reminds me of Romulan ale, and I think it's good, I don't like either diet, and I like Barqs better than Mugs.
Nevertheless, I'm not buying coke products in any fashion.