From what I understand, Petronix does not add nor subtract from the Performance of Points. It is just a electronic switch that does the same task of Points. The only benefit, I know of, is the points do not burn or wear and the rubbing block does not wear.
Button
Aside from the lack of need for maintenance that you mention Bill the biggest advantage is gained by the increase in Dwell Angle, just a refresher for you, the Dwell Angle is the angle the points remain closed and its during this period that the coil is charged up, the greater the Dwell the greater (up to the coil max) the firing voltage available. As mechanical points have a period where they physically open and close they 'use' a number of rotational degrees to do this, that reduces the available 'Dwell'. When your using a ferrite rod or light chopper disc there are more degrees of Dwell available.
Other benefits are of course removal of points bounce at higher RPM giving a more accurate ignition timing (as the distributor turns at half crankshaft speed one degree of Dwell variation is equal to 2 degrees of ignition timing change). Lesson over Bill ;-)
Hope your well.
Colin