Hi Slow,
If I was in a position where I had to sell one of my guns I would probably decide by "which one is easiest to replace at a later date" followed by which is the "least favorite one I own". I would like to mention a lesson I learned. About a year ago I managed to replace a rifle that I had to sell ,however, it took NINE years! I had an immaculate 1942 Smith-Corona 03-A3 that came from a WWII vets estate. Last year I had to "settle" for a '43 Remington 03-A3 in exc.cond. While the Remington is hardly a dog its not in the same class as the Smith-Corona. Another rifle went along with it which I haven't been able to replace as of yet. That one was a 1943 Springfield M1 Garand in pristine shape from the same estate.
The single biggest problem I have found with buying a replacement later on is the price increases particularly on a popular firearm. This is most evident with WWII firearms. I paid $825.00 for the pair of 'em in late '95. The best prices I have seen to replace those two was about $750.00 for the 03-A3 and well over $1000.00 for the Garand.
The moral of the story is: Be careful of which one you part with. You might never get another. If possible,try to part with the one you will miss the least if at all.
Last year I bought another 1911. Its a '57 Argentine Sistema Colt thats still fairly tight. So far its my only 1911 type(currently). My other pistol is a Taurus PT-92AFS (stainless) 9mm that I've had for six years. Until I shot the 1911 I would have considered selling down the road. Not anymore!LOL
I hope I never have to decide which one to sell because it would be really tough.(both are 100% reliable,FUN to shoot, and accurate)
IMHO, I would suggest selling the .22 cal instead. Just my .02 worth.
Sorry 'bout ramblin' a bit. I hope it was of some help to ya!