Enjoy your Tyros it's a fine instrument...but, in no way is it or will it ever be in the class of a TOTL a Workstation/Synth.
In keeping with the "open mind" theme, of course it isn't in the
same class, Donny...that's why they make both.

Whether the Tyros4 (or any other TOTL arranger) is better, or not as good, as a workstation, will depend on your needs, and your point of view.
I simply prefer the arranger over the workstation, and obviously, most, if not all, professional players/entertainers on SZ do as well (including you).

Questions...why do you use an arranger?
Don't you use
styles as well as SMF?
The arps on the workstations aren't nearly as flexible as styles for "live" play.
I'm not condemning your use of a workstation, if you choose to go that way, but, please explain why
you would use one
instead of an arranger?
Wasn't that one of the points of this topic?
Ian