Time for a cold hard case of reality. If you think changing your plug is going to gain you performance... think again. That is, unless your current plug is problematic already.
You'll notice no difference when you twist the throttle. At least I didn't... on either of my bikes.
THAT SAID... reliabiliy-wise... or if you are having issues with electro-magnetic energy and your speedo/computer... then yeah, big difference.