The one you gave me is optically perfect, no scratches or fugus or haze or anything. It was really nice of you to give me the better one. 🙂
The image from yours isn't bad, still looks really sharp. Looks lower in contrast than mine, though. Not a bad thing for shots in harsh light like the pic you posted, though!
Recently, I shot some photos of a building with the 90mm Elmar you gave me and the chrome Canon 50mm f1.8 that I have. The Canon lens I have is optically perfect, too, but I noticed that the images from it were a little lower in contrast than the images from the Leica 90mm Elmar. Both lenses are from the 1950s.