Coin toss.
Kat is more entertaining because she actually shakes her ass. Ironically, that's what usually counts against people like Scarlett and Ghetto Barbie.
Curvyredbone on the other hand just stands still in every video. As the saying goes, if it doesn't wobble, it's fake and maybe she knows that. And yet, she's more in shape and doesn't rely on camera angles as much.