the 12 is an impressive bike, I haven't even tried the other two plugs to see what difference they make, it is so much fun riding it the way it came. I have an 11 also and I can tell you it isn't the same as the 12 not even close. suspension is better on the 12 as well. I've added the pro moto billett kickstand and an FMF pipe (not sure why), and Pro taper bars.
You have to ride one to really understand how good they are, granted they won't have the top end of a 500 they are still fun to ride, they could be a little quiter