PCB claimed it was not worth the effort to add TTL like features to the Einstein.
Another thing that would be interesting to know is the t.05 time as power is reduced below 1:1.
That's one of the things I learned when testing Hyper Sync with ControlTL. The lower the power setting with voltage power control, the longer the duration.
It looks like the HS lights have the batteries under the light body while the others have the battery in the body. That suggests that the space used by the battery has been taken up with capacitors.
I wonder if they tested with the camera flash menu settings other than wireless.
If you get some to test, see if they support second curtain sync which is exclusive of wireless.
The Godox X1 system suggests that SCS will work with Sony. That's one of the first things I want to test.