There are settings for different activities in app, but they all utilize a single, central power zone & HR zone. I can manually set the zones so they match SYSTM (which as you noted ia based on cTHR), or “autocalc” in the wahoo app and the zones differ.
I’m not going to waste too much grey matter on this - I just set to my SYSTM zones this AM and went for my assigned run. Seemed ok.
I just chose the 12wk CX plan for my winter indoor/outdoor season because it included some running and crazy CX drills, with some outdoor rides on the weekends. Looked like a lot of fun potential for maximum suffering.