ZMC, the GZ has a larger front tire and less rake. This improves handling at the expense of looks.

The raked out front tire on the Rebel/CMX causes less weight to transfer to the front tire in heavy braking. However, the braking forces are similar. Therefore, the front tire is more likely to skid. Added to that, the CMX has a much smaller (in width) front tire. This reduces contact patch, also decreasing grip.

Skidding a rear tire on a motorcycle is bad but not terrible, skidding a front tire is usually a cause of serious concern. Read my report in the ride reports regarding that.