Since I have and use both products, allow me to comment. I believe at a quick glance you would not notice a difference. However, if your in the "full autogeek mode" I would say the BFCS yields a slightly cooler color temperature whereas the WGDGS a warmer look. Depends on your viewing angle but I have notice that difference when viewed side by side. Both go on exactly the same and frankly, I would recommend purchasing whichever one is on sale.