I've seen Paul Taylor using a Yamaha YSS-62(earlier) and Yanagisawa S991 (later) soprano. I think his alto is a Yanagisawa. He uses Dave Guardala mouthpieces and most likely Vandoren reeds. Sax players are always experimenting with stuff to get a certain tone.
If you want a sax like Paul's, you can contact Kessler in Vegas. Paul Taylor gives them a thank you on all his CDs.
http://www.kesslermusic.com/