Sadly yes compared to direct drive, but not a lot less. Define ‘a lot’.
Mine (a Tacx Genius) went through calibration today fine as usual, but during the ride the horrible squeaking of the tyre slipping on the roller began. Not normal but you have to assume there’s always some degree of slip and it will be worse the higher the power.
Resistance does change according to the pressure on the tire.
I have a kenotic trainer with InRide sensor and I hope that by calibrating every ride, the calibration accounts for this.
I don’t monitor hot right it is from ride to ride.
I just crank it and calibrate and hope it works.