By their nature aluminum shoes tend to 'hit' a bit harder then composite.....

BUT, that is as much controlled by the spring as it is the clutch material.....

From my experience running the narrower SC tires, a hard hit would not be a good thing in the majority of circumstances so you might want to stay with the standard shoes and play a bit with springs OR hang a set of aluminums on and play with springs to soften them up - which generally means a lighter spring like a .9.....

The wear of composite shoes is a 'bit' quicker then aluminum but the trade off is less maintenance. Neither set lasts forever!