Hi again David
I found that the 992 had a darker, sort of wider, fatter tone than the others, including the 991. It just suited me. When I tested all those horns I used three mouthpieces, a Lawton, a bronze Berg and a Berg duckbill. The differences in tone came through with all the mouthpieces, although with the various mouthpieces, each horn obviously sounded different.
The other variable, of course, is the player. Everyone's different, and will sound different with the same combination of kit. Even if you iron out all the other variables such as reed, mouthpiece and sax, no two players are exactly alike. Things like your basic physiology, jaw shape, and in my case, a, er, 'characterful' selection of missing teeth all change the sound.
One thing about Yanagisawas in particular, and also Yamahas to a slightly lesser extent is that they have a reputation for long term reliability and durability, at least according to technicians I've spoken to. Obviously the likes of Walstein haven't had the chance to demonstrate the same - it'll be really interesting to see how they pan out in this repect. Somehow I think rather well. Time will tell.
Anyway, I couldn't agree more with the suggestion of trying before buying, and picking what suits you, rather than what someone else recommends. Have fun choosing.
Jon