" also found a link to budrichard's model21shotgun.com website. "

I started studying and collecting Model 21's when I purchased Schwing's book on the Model 21 in 1990. It took a number of years, a lot of looking and a few Winchester's to get a firm grip on the Model 21 and Winchester versas CSMC. I first met Tony Galazan in the early 1990's and admired his guns but I still could at that time purchase Winchesters for less. Eventually the price of Winchester Custom Shop guns and 'Custom Built' in Mint condition rose high enough that CSMC guns became viable. CSMC also produces a true small frame Model 21 for the 28 and 410 gauge, something that Winchester never did. I have one CSMC Model 21 and couldn't be happier with the gun and service. I have another order with CSMC for a Fox because I wanted a lighter 16 gauge than my former 16 gauge Model 21 SKEET for upland hunting.
In regards to the difference between Winchester and CSMC Model 21's, its really manufacturing of two different eras and neither is better or worse.
I have stopped collecting and now delve only in bespoke guns to obtain what i want. I started the website to have a place for sane discourse about the Model 21 and have no relationship with CSMC other than a customer. Hope the website is/was of help.-Dick