The only thing that differentiates it from the base model is the bedliner stripe on the side of it. I doubt that spraying some bedliner on a very small area of the cap increases its strength as the manufacture claims in their advertising. It has the same dynamic and static load rating as the base A.R.E. cap. A.R.E. does offer a HD model which comes with an aluminum internal skeleton. They recommend the HD version if you want to haul anything heavy like a roof top tent on it as it is rated at 500lbs dynamic.
"The Overland Series truck cap offers a tougher, more rugged look to complement today's trucks. It's unique two-toned off-road design features a spray-on protective coating which increases strength in high stress areas."
When I was researching A.R.E. caps I found this email on a overlanding forum.
Thanks for your interest in our products!! The weight rating on our Yakima Rack when driving the vehicle is set at 150 lbs. due to various dynamic forces such as sudden stops, potholes, sharp turns etc. Additionally, you should always consult the vehicle manufacturer for center of gravity ratings. When the vehicle is not moving (for camping) the roof and rack can actually carry well over that amount. While this is not something we guarantee under warranty, our caps have been tested to hold well over 800 lbs. when stationary. If you have any further questions please do not hesitate to contact me.
Thanks,
Anthony
A.R.E.