Since there are differences also in the size of the glasses and definitely differences in the availability and demand of certain characters, it is tough to say which of black and white are more valuable. In the regular thick tall (Brockway) glasses, the harder to find characters - Slow Poke, Henery Hawk, Tasmanian Devil, usually sell at higher prices with white letters. I don't think there are much differences in the other characters but I don't follow the internet sales at all. in the thin glasses (Federal) once again it seems the white letters are somewhat (not a lot) harder to find so might be a little bit more pricey.