I was agreeing with your notion that the names were based on the sets rather than differing blade holders.
One question for the Wiki to answer:
Which models are which?
I think I'm right in thinking the Prep Razor is the T shaped razor, akin to a primitive Cobra; Orderly Razor is a metal folding razor, much the same as the Bantam and Hair Shaper but carrying the Medical symbol; what distinguishes the Nurses Razor?
where can i get the weck corn blades? you never said that i saw?????????????/Here is the corn razor alongside a couple other blades for reference: GEM SE, Weck Sextoblade, Weck, and Weck Corn.