Tempted by gravel bike tonight ... start is downhill to the dirt section so shouldn't get dropped. Then a long slight uphill drag on dirt where the gravel bike excels. Should be able to draft enough on the 2nd tarmac section until the dirt climb section where again the gravel bike will fly.A recent ZwiftInsider article said that the best gravel bike with either of the new gravel wheels is now just slightly faster on dirt than an MTB with stock wheels.
Seems like a no brainer!