Where is this from? Brand/name? Or is this selfmade?
Carbonfiber is poor under compression,but strong in tensile.I would think your al one would be better.The decals are expensive.
I have to upgrade my chassis stiffener. I'm going with a carbon fiber tube in place of the aluminum in there now. Less weight rules with these RC's. It's hard to keep the weight down but every little bit ends up helping me. It stops lots of flex and will be very light.