My very favorite combination, when it was available, was two bras (one with molded cups, one with sewn) and two each of three styles of underwear, all from the same line.
For example, if I were still to buy from this manufacturer
http://www.primadonna.eu/en/pr.....-you-black
I'd get two different bras, and six pairs of underwear in some combination of what they offer. (Sadly, this company's quality has plummeted over the last decade. Nor do they offer camisoles for most lines, as they used to.)
Right now, with my body unexpectedly having changed quite a bit, I'm extending minimalism to the underwear aspect of my wardrobe. So, just two bras, from different makers, and both go "well enough" with black underwear from previous sets. Not well enough for my personal preferences, if I'm honest, but well enough that it still looks intentional. Panties get washed after every wearing, bras sometimes get re-worn but often rinsed quickly using Soak or Eucalan.
I know someone who wears sets 1:1 and washes each together after every wearing. That works very well for her, and she has about 20 sets. (Which in turn works because her size remains consistent, by some feat.)
Does that answer your question?