The P-E will fire and clean up a fouled plug. The MSD will not. The multiple spark of the MSD really does nothing for you if it won't clean up a plug.
I haven't used the MSD's in years and the company has been sold at least once if not twice in the last 20 years. I do not know if the product has been improved. Hopefully so because there are a bunch of us that have stacks of failed units.
I gave up after three and went to the Ford Duraspark which is an exceptional system. For most it will be fine. The P-E is just better. True, aftermarket Duraspark parts are available just about anywhere but there isn't anything to fail on the P-E.
I don't know where Jon gets his technology from but I suspect that he is an alien because it's beyond this planets.
You should buy some of his stuff. He works in his basement and has only one light bulb. He won't even share that with Titania.