It depends on preference, I get bright whites with Firebird and CMYK hasn't been brighter but I've been testing for about a year. Some people still prefer DuPont though. We just have to make sure that since Firebird is the new guy on the block that its consistent. So far each batch that is tested has been good. One bad batch and whoops there goes a head so there is a high responsibility for Firebird. I am sure they know what they are doing though. There are people that try it and say they like DuPont, then others say its the best thing since sliced bread. They can all agree whether they like it or not that CMYK is very vibrant