I haven't seen either of these, but as for bras, I've never seen one I liked on the car. I am considering a new type called a "clear bra" which is a thin sheet of clear plastic. It is applied by a special shop, and is breathable so that the paint underneath it will weather at the same pace as the rest of the car. It protects the front of the car from scratches and dents from rocks, and is completely invisible from farther than 4-5 feet from the car. I know some people who have them and they work great.