versus coke...

No. There's no discernible difference between any kind of cola, Pepsi, CocaCola or store brand.

I absolutely can! I like Pepsi pretty much any way it is served- fountain, can, 2 liter, bottle. Can't go wrong with Pepsi. The only way I like coke is out of a fountain. No thanks on a can of coke. I also can tell the difference between fountain coke from any restaurant that's not McDonalds. I'll swear till the day I die, that McDonalds does something special to their coke.