3060 lbs Crossfire Limited
3541 lbs C32 AMG

116 ft Crossfire Limited 60-0 stopping distance
117 ft C32 AMG 60-0 stopping distance

In spite of being 16% heavier the C32 only stopped 1 foot (0.86%) longer. It's the best example I know of the braking improvement you should expect, and the Xfire also has far better tires instead of the smaller all-season rubber the C32 is shod with, meaning the actual difference will exceed 16%. For me the pedal feels more solid since the calipers are no longer sliding, but are bolted directly to the strut assembly.