I switched from a Schwinn Speedbike IC8 Fitness Indoor Bike (bought in December 2020) to Zwift Ride & Wahoo Kickr Core 2 on 15th of October 2025. I was aware that the Schwinn power meter is not very accurate, but I did not expect that difference: Schwinn FTP: 296 W, Zwift Ride & Wahoo Kickr Core 2 FTP: 199W .The 199W is fitting also better to the power caculations in Strava when riding MTB. So I am no longer a Watopia superman 
I measured FTP with Zwift Elevation Evaluation in Watopia.
See also my power curve with Schwinn IC8 (until October 5th 2025) compared with Zwift Ride with Wahoo Kickr Core 2 (from October 13th 2025)