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Yes, the PCB foldable soft box would be a natural for the Einstein.
There are a lot of differences between the Impact unit and an Einstein.
The Einstein is superior technology and a true moonlight with AC power and, as you note with the Cyber Commander remotely controllable.
One advantage the Impact light offers is that the battery pack can also be used with speedlites. And the price is attractive as a higher powered light source at a wedding. Its probably a bit smaller and lighter than the Einstein. Also less power.
I have 4 Einsteins but rarely take them out of the car at a wedding unless I have an assistant to help with them.