Just to put to rest any last confusion about the competition package, you can read the info from BMW directly:
Pre-LCI Brochure
https://www.auto-brochures.com/makes...0M6GT_2014.pdf
https://www.auto-brochures.com/makes...%20M6_2014.pdf
For those who crave even higher performance from The Ultimate Driving
Machine,® the BMW M6 Competition Package brings elevated power,
precision and conviction to every stretch of road.
The potent output of the M TwinPower Turbo V-8 engine has been
increased to 575 hp for the ultimate adrenaline kick – and, in the M6 Coupe,
a 0.1-second shorter 0-60 time. BMW M engineers achieved this 15-hp
bump by raising the charge pressure in the upper rev range. This added
power, channeled through the modified sport exhaust system, emits
a sound to thrill your driving soul. The suspension has been reengineered to adjust the damping forces and stabilization levels to
support sportier driving.
The characteristics of the Dynamic Damper Control system have been
adapted to handle the increased dynamics, with M Dynamic Mode
(MDM) settings further defi ned. Steering is even more direct while
providing authentic feedback from the road; the steering ratio, revised
by 10 percent, ensures exceptionally sharp response to every movement
of the wheel. Outside, the M6 with Competition Package is marked by
exclusive 20" Double Spoke (Style 601M) bi-color M light alloy wheels
and purposeful-looking Black Chrome quad tailpipes.
LCI Brochure
https://www.auto-brochures.com/makes...%20M6_2018.pdf
20-inch Double Spoke wheels (Style 601M)
(options available)
Performance upgrade (+40 hp)
Enhanced sport suspension/damper application
M Dynamic Mode
Enhanced/more-direct Steering
Sport exhaust with black chrome tailpipes