Hi Folks, not sure how many people would contemplate building both Explorer styles and have attached some photos to show the slight differences.
Other than one being a set neck 6 string guitar and the other a bolt on neck 5 string bass there are a couple of distinct differences.
(1) Position of output socket which is a direct result of where the (2) control cavity has been routed, which in turn relates to (3) where controls are located on the top. Otherwise they are identical in thickness, shape, and bodies weigh pretty much the same.
Obviously where and how the neck joins the body and also the necks themselves are the glaringly obvious differences and will post photos of those tomorrow.