A few things I've found out about carbons.

Carbons will usually, but not always, survive a hit on something that would bend an aluminum. If the arrow hits hard enough to bend an aluminum beyond repair (aluminums can usually be straightened to factory spec or better, ya know), it will generally break a carbon. Carbons get lost a LOT easier than aluminums.

After testing carbons with a spine tester, I use the spine tester to find the stiff side of all my carbon shafts before fletching them and orient them the same way. I've found as much as .045" difference in deflection on the same shaft. That's a whole spine class for carbon, like having Beman 400's and 340's all mixed into the same dozen arrows. You don't see anywhere near the same differences in stiffness around the diameter of an aluminum shaft.

Straightness at the ends of the carbon shafts are often horrible. GoldTip's tech sheet confirms that problem by recommending cutting an arrow to length by taking half the amount off from each end. Aluminum shafts almost always run straight all the way to the ends. That's a big bonus for guys like me that use a full length raw shaft for arrows.

One of these days, they'll get all the bugs out of carbons, but they're not there yet.