At one time, 1950s, early 1960s, Nettleton was probably an equal of Florsheim, AE, and perhaps Alden. I don't think Hanover or certainly Stacy Adams were ever in that class.
Nettleton was better than Florsheim, AE and Alden. Nettleton was in a class with JMs. Stacy Adams was no less than equal to Florsheim, AE and Alden.
Don't be fooled by today's SAs. During the 50s and 60s JM, SA, and Nettleton were in the same price range. Florsheim, AE and Alden were always a few bucks cheaper.