Electronic ignition upgrade

The timing (when the spark fires relative to rpm, load, and mixture) is the most important thing. Compared to that, how it is triggered, and the alterations of the spark energy are minor and will not make up for less than ideal timing. On a hot rodded or race engine with poor idle and high rpm demands (4000 rpm and up) there's a bit more to be gained from ignition systems than stock engine, especially a non smogged one.