The 4 Way Case can be built with either plywood or OSB. Plywood and OSB cases fully enclose the goods, and come with a securely fit lid.
One of the main benefits of using the 4 Way Case is the manoeuvrability provided by the blocks, allowing the case to be lifted from all sides depending on the length & width of the case. In some scenarios, the 2 Way Bearer Case is a better option solely due to the dimensions.