Different virtual power output between ANT+ and bluetooth

any ideas why the virtual power output is so different depending on whether I am connected via ANT+ or Bluetooth? I use a misuro ANT+ & Bluetooth speed & cadence sensor on an elite muin smart B+

Did you ever find out? I used ZwiftPower to compare two .FIT files, one with my Quarq PM connected over Bluetooth (to Zwift) and the other with the same PM connected to my Garmin over ANT+. They’re so, so, so close and yet so different, even though the source is the same!