I think Wahoo spindown is plenty good for calibration.
Generally BT connection appears to be a lot more stable than ANT+, so if you have a choice, I’d stay with BT.
On the other hand, I use BT for Zwift and ANT+ for TR to run simultaneously.
If you race on Zwift, any readings dropouts will be super frustrating.
Thanks. If I pair/calibrate using bluetooth/wahoo on iphone - then turn off iphone bluetooth - and turn on mac bluetooth and pair w TR - does the ios/iphone/wahoo calibration still hold true?
Kickr Snap user since December 2017. Every calibration I’ve ever done has been in the TR app on my Ipad. I now have a Quarq PM on my bike and the Kickr Snap and the Quarq track very close, within 2% of each other throughout the workout. I recommend doing spindown calibrations connecting via Bluetooth inside of TR. I don’t use the Wahoo app for anything other than firmware updates.