Same tire @brenph? Sure. But how does that help without some known power constant to measure both against? I’m on a Kurt Road Machine dumb trainer.
Wait, are you suggesting I use TR Virtual Power as the constant? Hmmm, I wonder if that could work actually. Same exact tire and tube (actually moved rim to rim), pressure and drum tension. Ride ramps to virtual power only in TR with a speed sensor and record power meters separately to head unit for comparison?