I have not tried these two models, but, because I have never been able to find a reasonable K-32, I have had a number of these in .32 SWLong caliber.
Guns are very, very solid. Great accuracy and reliability and a lot of that S&W feel. They are, however, rather tricky to disassemble and I was never able to find any custom grips. A very nice revolver with great workmanship and a good price.