Many moons ago, I would've said Coke. But then Lana Del Rey wrote Cola and I have since changed my answer.
I grew up on Pepsi, it was just so much more prevalent in the STL area imo. I like both but Pepsi with real sugar is so good. Plus, Diet Pepsi is better than Diet Coke and they both suck so there
Pepsi is a lot more common around where I live than Coke, and I grew up drinking it, so Pepsi 100% But if I was getting like a small pop with a slice of pizza and the place I was at had the option to get Coke (more often than not they don't where I live) I'd probably grab one. If I'm buying pop for home? Pepsi without a doubt