Airsporters, especially the earlier ones are very nice handling, well balanced guns. They were a slick and innovative design when they came out. I've owned a few over the years, but sadly never really bonded with one. It might still happen one day.
Whereas my .177 MK3 with a folding Parker Hale aperture rearsight, was an accurate rifle of which I have very fond recollections of. It sometimes felt I couldn't miss with it ! I sold it over 20 years ago for holiday funds and still feel remorse ! Though a very good mate of mine bought it and still has it, which is great too.
I don't think either is a better gun - the Airsporter was more graceful, innovative and a mile stone of airgun design - but the Webley Mk3 is accurate, massively constructed from high quality materials and tough as old boots !
"helplessly they stare at his tracks......."