My Springer Loaded Stainless 9mm was manufactured in probably 2010. It is an N-prefix and the slide to frame fit is nothing tight nor impressive. There is nothing "shoddy" about it, mind you, but it is very average.
As shipped, the trigger was very much below average. Functional and safe for sure, absolutely useable, but gritty, creepy and heavy. It would offend a trigger snob.
At the same time, I had an NM-prefix Springer Loaded .45, purchased a bit less than a year before. The two pistols were not identical twins, but VERY close. Owning both of these was a VIVID demonstration of the difference between an NM and N-prefix Springfield 1911.
With eyes & no hands, they appeared to be two of the same gun. Hands-on and blindfolded? You'd be shocked.
To be clear though...
I sold the .45 and kept the 9mm. Just a small handful of years ago... options for a decent 9mm chambered 1911 were very few. With some trigger work (and about 2,500rds I put thru it!), I have really gotten to like it and have no regrets about splitting up these "twins."