The predominate difference is that VinylMaster CUT has a basic vectorizer in the USCutter edition whereas the Future Corp version does not.
Also, the USCutter edition comes with drivers based on the cutters USCutter sells whereas the Future Corp version includes them all built in.
However, there is a downloads page that includes over 5000 drivers for the USCutter edition here:
https://fcws1.com/drivers/driverconsole.php
As such, and excluding the vectorizer for CUT the differences are minimal.