The first time I pulled a wire from the cap of my 440 (with an MSD 6AL and a Blaster E-coil) while it was running I was AMAZED. THATS LIGHTNING FOLKS! Far more energy than I have ever seen on any stock ignition. We're talking CRACK CRACK CRACK with arcs easily 1/2 inch or more long. Not a weak little snap snap snap.
There is no comparison.

I have a MUCH higher level of respect for avoiding getting zapped with capacitive discharge ignitions.