I’m not expert, Audiophile or engineer. Maybe it’s just me: but I think that the 57 sounds completely different than a 58.
To me:
*The 58 has a quite noticeable upper midrange accentuation. I don’t feel it subtle in the slightest.
*The 57 goes waaayyy lower and the high end presents is pretty ‘hey look at me.’
Of coarse I’m sure you can get them to sound exactly the same with changing the windscreens or whatever and using a lot of eq, they do act the same way. But using them dry I wouldn’t even call them the same thing.