Unlike many of the other Japanese brushes that originate from Fuso Seiki- while these brushes use similar construction, they are physically different. An Olympos Micron is the same as an Iwata Micron, minus a few key specs around the nozzle or nozzle cap, and needle. These brushes are completely different, although they will accept the same nozzles and needles - the bodies are larger diameter on these (12mm vs.11mm). Most of the threads are a different size, etc...
I have done some preliminary spray tests, and they work well. The Phoenix (the A Cup) will produce perhaps the finest line I have gotten out of a brush. All of the paper work included eludes to the brushes design aimed at working at lower air pressure, but I have not seen that to be necessarily true. At a decent medium pressure(using a MAC valve), it will produce a very nice, very fine line. In comparison, the lines created by an Olympos will appear a bit fuzzy, especially on the edges. Iwata, a bit thicker, and darker, but with very clean edges...
I'll be working more with these over the next few days.