I started out shooting aluminum arrows for a number of years and I prefer carbons because I have found that they are in fact more durable than aluminum.

I find that..............

When pulling them out of a target they will not bend if you happen to pull a little bit not straight out.

Little side hits in the trget will not crease them like aluminum.

Given the same weight carbon will out penetrate an aluminum because they are skinnier, do not flex as much when striking a target, and recover from any flexing faster resulting in more of the arrows energy being transfered into penetration rather than side to side movement.