Howdy
I hear a lot of folks who claim that stainless is easier to clean than blued. That has not been my experience.
In my experience, it is the finish on the metal, rather than the actual material that makes the difference as far as ease of cleaning is concerned. A highly polished surface, no matter which type of steel it is, will be easier to clean than one that has some texture to it. Ruger puts a very high polish on their stainless guns, at least they do on their single action guns, to simulate the nickel plated finishes of long ago. Their blued guns have a pretty high polish to them too. In my experience, it requires the exact same amount of elbow grease to clean either.
However, a stainless finish will tend to highlight any smudges of fouling that a blued finish might hide.
Same with fouling. The more highly polished the surface, the less fouling will cling to it. The actual material does not matter.
I do not think there is any noticeably different wear characteristics to either metal either.