Dave, if the CV Max & the new Pentz clone are exactly the same they are probably using the same blower, same fan and the same intake and exhaust size ports. There’s only a few ways to make air move faster... using the same design.

-More RPM,
-More fan diameter,
-Larger inlet and exhaust,
-More horsepower (measured in kilowatts)
-Larger filters (or less filter resistance)
-More efficient fans (blade angle/displacement and overall weight)

Changing any of the above could directly require changes to more of the above.