So I installed the M Performance knob today. Few things of note which I have not seen definitively said yet.
The knob seems to weight the same as the M-Sport knob.
The knob IS shorter than the M-sport knob by about...~.5 inch.
Removing the original knob:
1. boot, easy enough, people should figure this out easily
2. pulling the knob off...took A LOT of force. In fact, I clocked myself in the eyebrow with it LOL. no damage done, just hurt like a bitch.
worth it? YES. love the feel. love the look.