Ok. All the usuals, carbon has a smaller diameter, making for flatter trajectory created by less resistance, and better penetration because of the same. But, I would bet that your aluminums pass completely through a deer, and how much more penetration can you get..
Here's the point for me. Aluminum arrows get bent, kinked, dented, all sorts of things. Carbons can take a hell of a lot more abuse. They are either good, or they are broke. There's no in between. JMO.