Tour de Zwift 2020 Cycling FAQ

Zwift needs to up their game here, possibly with a live q and a. The B race was suppose to be shorter than the A race. Nobody seems to know anything for a certainty. I thought the A race would be at least several laps more than the B? Does your w/kg matter in a race under 20 minutes? and I thought tron bikes and disc wheels rule only applied to the pro/am race, that first event held live today by invitation only?