I am not sure what you mean by that ? Most models are the same frame, like cars, more you spend, more options and gadgets
Higher models, you get adj sights, triggers, Citations, trophy, victor models, gold plated controls
Some have ported barrel, barrel weights, comps, etc.
I am not a collector at all, I only want something nice to shoot, decent trigger and somehow accurate but I don't consider myself a good shooter anyway.
I saw models on Tradeex with the slide being branded "High Standard" while other were branded "Hi-Standard" almost like they are a Chinese knockoff....
Of course, being on Tradeex, I am sure it is the real deal but I was surprised to have 2 different ways to spell the brand.