Ruffles are sliced from potatoes. Pringles are reconstituted, in that it's still potato but more like flattened hash brown potatoes. Pringles has wilder flavors as well.
I am not a fan of chips that come from the can, they are too routine and the same for me. Ruffles chips have some individuality in them, different sizes and textures in the same bag. I mostly just prefer the taste.