I did a bit of searching and found power curves for the Tacx Satori and Tacx Blue Matic. As of now the Satori is not yet supported by Zwift, but the Blue Matic is. Given the power curves below, I would say they are very close to each other. Accordingly, I’m going to use my Satori with Zwift disguised as a Blue Matic
From my figure, I’m deriving that at 30km/h the difference in power output us about 10watts, this seems to increase to about 20-25 watts at 40km/h.
hope this helps other people to start enjoying zwift too!