Nonstick Hard Anodized

nonstick and hard anodized pans?!?

what’s the difference between these 2?
im buying a set of pots/pants and i only want one kind. which should i get?
also, why do some stores sell both of these combined into one pan?

hard anodized refers to the tougher exterior of the pot, and it can also be nonstick

Calphalon Contemporary [...]