Ketchup, motherfookers!

Pearl: "Is mayonnaise an instrument?"
Marina: "No, Pearl. Mayonnaise is not an instrument."
Pearl: "..."
Marina: "Horseradish isn't an instrument, either."

Go Team Ketchup!

Both. You mix them together to get a Utah invention. Fry Sauce! It's awesome!

Ketchup is great is you want your food to taste like ketchup.

Mayo has range and can be used and flavored ridiculous amounts of ways, so is therefore superior.

Ketchup, though I'm not a big fan of either

Yes, yes and yes. This guy knows. And it's the healthiest out of the three.

No way, I'm expecting a lot of hilarious and suggestive mayo fanart.

As for which, I'm more of a ranch fan myself.

It truly is. I stopped using sauce for the majority of my foods, but mustard is an exception. It isn't 99% fat or filled with sugar.

Looking forward to joining in battle. Team Ketchup!