. I don't know about the finish..
I don't know about those models, but I have a C3 that I LOVE.
I love my Sig 1911 and carry it often. I have never had a problem with malfunctions or the finish. As far as holsters, there are more now but can still be hard to find. I solved that by learning to make my own out of kydex. Over 2000 rds and still looks and run good.
Its an "ok" 1911.
Holsters are hard to find. This is a major, major issue.
The external extractor is good but not great. <S&W E series is better for instance.>
It would not be on my list of guns to consider, unless I had no plans to carry it ... anywhere. Holsters are THAT unavailable.
That is all I can contribute.