The interesting part is that they went to the sliding sleeve to save manufacturing costs. They are the only dies that combine a sliding alignment sleeve, disassemble for cleaning without affecting settings (even while still in the press), optional micrometer adjustment screw, and ability to seat and crimp in one step. Oh, yeah, and they come with the best lock rings on the planet.
But to be fair, Redding Competition seaters, Forster seaters, and RCBS competition (inline windowed) seaters also have a sliding alignment sleeve. Dillon seaters disassemble for cleaning without affecting the settings, and Forster seaters can be had with and without the micrometer seater (and they come with a fine lock ring too).
Andy