Don't have the Smittybilt Storage Vault, but do have Tuffy Security Deck which appears to be where Smittybilt got the idea from. You can compare the products and see if they're the same specs or not. I love the Tuffy deck that I have. I have a couple little ones so I am always carrying something with me. Had the Jeep broken into twice with the soft top on, luckily keep the Jeep mostly empty so they didn't get much. With the deck on now though I have no fears. The thing is solidly built and is useful for not only concealing/securing things beneath it, but comes in quite handy as a shelf for double decker storage when needed.