Sure. Below is a 1944 manufactured Remington Rand. It is very comparable to the issue pistols I carried on active duty up to 1985 when I got out.
Compare the grips, sights, trigger, backstrap, hammer, and safety and you will
see that they have all evolved to deliver better accuracy, and a more comfortable, ergonomic grip. Together, these factors make a BIG difference in accuracy and comfort. And purchase price, with some tight, high quality M1911 clones selling for $1,500 and up.
So, if you are nostalgic or excessively romantic, by all means buy a new production M1911 "Mil-Spec." You'll learn quickly that the advantages and disadvatanges of this configuration of this pistols are incredibly hyped by enthusiasts and manufacturers. And that the many, many replacement parts made since then are designed to improve the accuracy and ergonomics of the issue design. The Army units using M1911's don't advertise their selections, but the USMC purchases of parts for their "MEUSOC" pistols are all of the improved patterns - what was good enough for their grandfathers (or me) may not be good enough to win the battles of the 21st century.
Springfield, Inc. "Full-Size"
Springfield Inc "Mil-Spec"