I scienced the cat. While I was away, I left her 3 big bowls of food: 1) cheap Meow Mix; 2) Rachel Ray's Delish premium cat food; 3) Beyond grain free food.
I came home to discover she'd eaten every bite of 3, had licked the bowl clean. Didn't even touch 1 and 2, although we'd known she'd eat them if she had no other choice.
I guess that settles that. I'd been kind of hoping she'd like the bargain food, but nooooo.