Keep both patent nude shoes. (I am not certain which pair you meant was K/R). But BOTH have very distinct uses: pointy for white pants and jeans, and some pencils. Round for your more romantic flowey looks with dresses and some skirts.
Although if you MUST keep only one, then knowing your outfits and your style, I'd go with the rounded toes patent ones. Plus the fact that they are real leather means they won't let you down or hurt your feet in the long run (pun or no pun).