[Nick_R_23]

You’re pretty much spot on. For the most part (and yes, there are exceptions to this), a spark is a spark. If a spark has enough energy to ignite a mixture under compression, there is little you can do to improve upon that. Indexing spark plugs would be one way (positioning the electrodes to be exposed to the mixture and the tip to the rear instead of blocking the flame path) would net you a small gain at higher power levels. You can increase the plug gap if the rest of the ignition system is capable of supporting the higher energy output with the goal of creating a larger spark (spark area) exposed to the mixture, but you’re more looking at added component wear in the hopes of a complete combustion process which may not be an issue to begin with. You also start having more inconsistent spark the higher your cylinder pressure becomes, whether high compression, boost, etc - the pressure can quite literally “blow out” the spark. This is why higher performance engines actually trend towards a smaller gap as performance/cylinder pressures increase - the smaller, quicker, more intense spark, especially when backed by a higher energy ignition system, is more capable of withstanding higher cylinder pressures and richer fuel mixtures, as well as taxing the ignition system less while delivering more spark energy, as it isn’t being wasted by being used to jump a long distance gap.