Generally speaking, rubber fuel line is easier to have get damaged, pinched, poked, kinked, etc, than a fixed line (be it plastic or metal) Braided steel line holds its shape and rigidity better than regular rubber fuel line, and is much more abrasion and damage resistant. Just get a high quality line rated for your type of fuel and pressures, make sure it's routed correctly and attached to the frame and what-not correctly, with the correct type of fittings on it fastened correctly, and you should be fine.