It makes no sense to measure WDS virtually, because the virtual machines got ready at different times. That’s because multicast process deploys and the installation takes part “offline” so it is not like fog, that all machines get ready at the same time with multicast. Tomorrow i can test multicast performance but only with an 100 MBit switch.
For sure it can be said fog is quicker with 1 Gbit both in backup and deployment.

@develroo I’ve had the FOG server running on raspberry pi 2 for quite a while. That is the 1.4.x series. For fog 1.5.x you should run that on a Pi3 or Pi4. The matter of fact, for fog imaging a Pi is more than enough for hosting the fog server. Now realize that the scope of service is for imaging a small number of system and no computers running the FOG client. The Pi4 is a bit more capable with 1GbE networking and USB3 for externally attached sata drives. The Pi 2 suffers with 100Mbs networking and USB2. The Pi3 has 1GbE networking and USB2.

For FOG imaging all the Pi needs to do is monitor the imaging process and move the image from local storage to the network adapter. The target computer does all of the heavy lifting. So the Pi3-4 is more than enough for acting as a limited or mobile FOG server.