The reason why this car is harder to heel-toe on isn't the pedal placement. It's virtually identical to every other manual BMW I've ever driven. The problem is the pad compound and brakes are from the CSL/Competition package but on a lighter car, so you don't need much pedal pressure to haul the car down from speed.
Umm - the Z4MC is heavier than the CSL dude!
E46 M3 CSL: Kerb weight: 1385kg
Z4 M Coupe: Kerb weight: 1495kg