I have both and the ones that are always on the truck are the MaxTrax. Been on the roof for four or five years and UV does not seem to be a problem, even in southwest desert. If UV still worries you, just spray them with a coat of paint that bonds to plastic, same as used for PVC pipe that is exposed to the sun (think pool equipment pads). My other planks are pierced aluminum. MaxTrax seem better for bridging than are aluminum. Steel probably the best but just too heavy and unwieldy.