Hi Peeps,
Although the FSF is not break proof, it is made for aerial transitions and trick freestyle in the surf which would imply it is made strong enough to handle general wave/surf abuse.
I certainly wouldn't try kiteloops on one or landing a megaboost hard and flat, but I would imagine jumping over waves on the way out the back wouldn't be an issue so long as you respect the board and keep in mind it is not indestructible.
They are a fun little board for junk surf when conditions are less than ideal for a surfboard.
The 09 Choptop I would imagine is unbreakable, it is without a doubt the heaviest board ever made. If it doesn't surf the way you want, you could always use it for a car ramp!

Cheers,
KH