Gx attack is technically deference from VSTAR POWER.
But at very least on Ptcgo we still have one botton now (change from gx and now write vstar
The question is. We can use them both? (expanded format or unlimited) and if yes even in the same turn?
There won’t be an official ruling until VStar is out, but I can’t see a scenario where they’d be considered the same. You’ll be able to use both once per game (and yes, even the same turn).