I once had a Sig 225 which was basically reliable but would jam with a few loads. The same loads were perfect in the 226.
I know there are plenty of reliable guns with single column mags but I would bet the reason those Sigs interchange in double space mags but not in single is due to the mag design as much as anything.
But I have responsibilities to uphold as a proud member of the gun of the month club so I like to tell the girl friday I'm into investmentment buying and the market is poor so I buy low and have to hold on to em till the price goes up.........:o) A few gun safes later I don't think she's buying my explaination or reasoning any more.
BTW I have a 228 also and have noticed they aren't around too many times. They getting rare now ? (obilgatory, look dear I'm researching value question :o)
Stay Safe !!