FWIW, I fly radio-controlled model helicopters; both of these materials are used extensively in the current crop of machines and have seen enough use to get an idea of how they perform.
Carbon fiber has more tension strength per unit, but it also more brittle; especially in shear. Hard impacts (such as crashing<G>) will almost always cause CF parts to at least crack, and when they break completely, they usually do some collateral damage to surrounding pieces/parts. This is tough stuff, and a pretty good crunch is necessary to break it. But when it breaks, it is ugly.
G-10 is more resilient, but is heavier. It was the material of choice for high-end machines until people discovered CF. It is now disappearing from general use, and the only manufacturer still putting it on models as a factory standard was just sold to a third party.
I have several G-10 handled folders. I think G-10 is a superior material for scales, because CF would be more prone to crack if dropped, and most importantly, if the edges are not properly dressed and sealed, you could get splinters of the stuff in your fingers or hands; and that would be very bad indeed. CF is quite hostile to the body, whether in the form of a splinter that works its way in very deep, or dust inhaled from grinding, etc.