Hi Scott,
Thinking of you this past week, hope all is well.
Our wonderful minds will always search for new problems to solve--and that's why I have a KN7 and a Tyros.
I relate this as having a wife and a girlfriend--and loving them both. It feels good at first, but the complicatinos outweighs the benfites.
Years ago I used a Midi keyboard to control two sound modules, a bass moduel, and a drum machine. It sounded good, but was to complicated to use on a job.

I thought of using both my keyboards on the job, but I know it would take away from my performance.

What I would do;
1-convert the Technics styles to Yamaha.
2-Add a good sound moduel, the best that I could afford.
3-Add a volume pedal to control the moduel, adding different sounds to the Tyros.
You play a good drum sound moduel against the Tyros drums--no contest

IMHO---The Tyros runs short on some of the instrument sounds, a moduel would close that gap. My friend had an old portable Wersi organ. He added a Roland sound canvas and a drum moduel--The sound was fantastic.

The main reason I perfer my KN7 is the instrument sounds. If I added a sound moduel, hmmmm, that might just do it.

In general, the sounds of the two instruments do not blend, they seem to be coming from different places. They designed the Yamaha trumpet to fit in with the Yamaha styles. I do not feel the style would sound as good with a Technics trumpet.

Scott, I recorded
"I can't get started" on both keyboards, same arrangment--there is a difference!! I'll get the recording to you.

Have a special day, John C.