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rusty-pie said..
So comparison of durability is between fibreglass and carbon constructions both with no pvc wrap.
I'd say it will be about the same. I would chose the one with the most cloth (glass or carbon) layers on the rails.
The fiberglass will begin to show delamination (cracks making white "webs" in the glass) earlier than carbon, but the carbon will tear in a more "catastrophic" fashion (big tear) once it breaks. So it should be about the same, the difference being then more in the craftmanship of the glasser or sander than the technology.
Also, the weight will vary with the amount of the resin left between boards. But I found out that with the same construction (layers of glass and carbon cloth), and the same model, the heavier boards (so with just extra resin) were noticeably more impact resistant than the lighter boards. On a 105 liter board of similar shape and identical construction, the 7kg one show no paddle marks, the 6kg one some, and I had to put a strip of 2'x1" helicopter tape as a rail saver on the nose rails on my 5kg one. I guess this is because heavier resin jobs most probably had resin "wetting" more the blank, creating a strong surface layer in the blank. The extra resin seems not a pure dead weight after all even if it is much, much more efficient to add extra weight as another cloth layer than just extra resin, of course.
So, if you are not seeking an ultralight board at all costs, I guess that choosing the heavier model may bring you more durability. But I have absolutely no idea on how Fanatic build their boards.