Alvarto,
I indeed haven't found this information anywhere neither... Thankfully, I wrote "might" in my post title!
But I should have written "deducted" instead of "learned". Sorry, English is not my first language...
- Colonial White is said to be "warmer" than Cotton White
- I've seen Colonial White and it's not blueish at all. I haven't seen Cotton White yet.
- Colonial White is said to fit nicely with American Standard White. I suppose it's true, since it's slightly warmer (hint of beige, I'd say) than acrylic. I saw this in natural light.
- I *think* that Duravit's white is "colder" than American Standard's white
So I suspect that with Duravit's white, an ok pick *might* be Cotton White
But then again... one has to see it. It depends of the lighting, of the surface plan, etc., as other -- and senior -- members have posted here.
That's why I asked Toto some samples. Once I will have received them, I promise, as per a previous post, that I'll put them aside some other companies' whites and report in this thread.
Hope this helps!