Plumbing fixture colors (including white) never "match" across brands. Manufacturers want you to buy the entire "suite" of their fixtures alone, so each color produced is different.

Most are not an EXACT match. Most of the time, you will not notice the slight variation. Take a toilet seat to the tub. ................or buy from the same line.

I agree that once all are in they are usually far enough away from eachother that the lighting makes them all seem the same and IMo 2 brands is enough why make your life more difficult than you need to.