Posts like this seem like debating:

“Should I use flint, chert, or michmetal alloy to set off the gunpowder in the flash pan of my Kentucky rifle”

For 30+ years automakers have spent their $ on
coil on plug ignitions and
special alloy tip sparkplugs like Irridium/Platinum.

Using two spark plugs per cylinder leads to less need for spark advance and less “negative work” due to cylinder pressures prior to top dead center.

Spark gap size
( Saab trying to jump a spark all the way to the piston crown)
and spark duration “burn time”
are widely accepted as more important than
peak flash over voltage
or multi-spark,
characteristics that aftermarket boxes alter.

Isn’t it
“Barking up the wrong tree”
to make efforts like cutting open aftermarket ignition boxes and examining how the epoxy potting looks?

To each his own.
I am not against spending money on whatever experiment gets you out of the easy chair and turning a wrench.