The only difference in canned and purée is the consistency. Exact same product, the purée consistency is smoother and will pour out of the can, where canned will “plop” and need to be spooned to get it all. Both can be used in recipes calling for pure pumpkin. I haven’t seen cans of pumpkin purée in my local area, in many years; the only choices here are pure pumpkin or pumpkin pie filling.