I would highly discourage purchasing either of them. We bought both a short one and a long one right after we remodeled our kitchen a little over year ago. We have hardwood floors in our kitchen and they constantly move around on the wood surface. They have no adhesive qualities. We've since purchased some non-skid mats and they slide off those, too. The edges of the gel mats began curling up in the last couple of months. As for the fatigue factor....they're okay on that score. Still....I would never buy them again.