Electornic ignition, Coils & ballast resistors, again.

Ign coils rarely use the available secondary voltage. But the fools fall for the big numbers, such as 60kv must be better than 48kv, right, even though the spark plugs will only ever need 28kv to fire them.
Very unlikely that a coil rated with a 3kv higher sec voltage provided a 'better' spark due to the 3kv, more likely some other characteristic of the coil, such as greater pri current &/or more pri inductance that provided a hotter spark [ more heat in the spark].