Dulux White on White
Cool whites such as Dulux White on White, are basically a big can of white paint with a tiny drop of Black tint dropped in. I know what you’re thinking, “That’s just grey!” You are right: very, very light grey. Our eyes read it as a cool white.
White on White is the Cool White you're having when you don't want to go as grey as full strength Lexicon or as light as Lexicon Quarter. Its in the middle.
It's modern and clean without being as stark and clinical as Vivid White can be. Definitely a good alternative to Lexicon Quarter providing enough of a difference for you to make a choice. Between the 2 you have plenty of scope to select a classy Cool White.
If you've decided Cool White is the way to go, you really don't need any more choice than between White on White and Lexicon Quarter.