When i’m using racermate my P2M and the computrainer are generally within a few watts of each other.
In Zwift though I’m getting some pretty huge discrepancies which make it a kind of useless platform for me. So here’s what I"m hoping might work (but am new and don’t know)
Ant+ dongle for Cadence/HR/Power readings
Computrainer for Resistance feedback from Zwift