As far as I'm aware the only bonus of using a 6AL is a rev limiter.
but basically any 6 series MSD will have a high output for the ignition, which should increase gas milelage, provide a better burn of fuel in the combustion chamber. in theory it should help with performance, but not a significant amount to notice a big effect.
I'm not to familiar with how good the honda ignition system is, so it might not be a great benifit at all.