Well, hardly variations and hardly simple. I am the person that moved over 100 Semmerlings (LM1, LM2, LM3, LM4, XLM to the Smithsonian, the Cody and the NRA museum that you see above.
I assure you that each was a gem of the highest order, each hand built, each magnafluxed three times, most different. I have moved some of the rarest and finest examples to museums and, without a doubt, this collection was one of the most remarkable. It took a person with particular requirements to actually carry a Semmerling in real life, they were out there, still are out there and there is still a robust market for the very few Semmerlings that make it out all without exception, LM4s.
Would a person who understood the actually requirements of the LM4 ever be satisified with a 9mm of any make or model? No, its nonsense. But if one remembers that the typical LM4 carrier, or the hardly typical XLM carrier is not a fictional character, well...there you have it.
Here for your enjoyment, the rarest of of rare photos. A "jack" and the real Master "Q" and serial number one (1) of the LM1, LM2, LM3, LM4 and yes, the XLM.