If you go to Catalina22.org, confirm what I remember reading, which is that the MkII model of the 22, introduced in 1995, is the model that weighs more. There may be small differences in other years, but that is what people are referring to. Catalina
Yachts even responded to input and started building a "Sport" model after that to get back to similar characteristics to what you have. The keel/centerboard boats are more desired by racers than keel versions.
As far as "tender" goes, it's basically the "Tippiness" of the boat. It has to do with keel weight, depth
of that weight, beam, amount of sail, height of mast
, etc. Sometimes it refers to initial heel, and not whether it will flip over. Of course, like in racing
dinghys, they will and do flip over, but you'd really have to work at it or be very unlucky in a Catalina22.
It's my dream boat, but can't be in the market for one.