Why would they only make Grapes have a portion of leather and Durabuck and make production harder on themselves by making all the similar white uppered colorways different? Isn't it more likely and logical the others were also made with a combination?
no the reason is that Durabuck was lighter and more expensive than leather. the original shoes designed by Tinker were intended and designed using Durabuck and were intended for mj to play in so the designs had intentional performance reasons within the designs that included Durabuck. the grapes and other 6's were not intended for mj to actually play in they were basically early lifestyle shoes so they incorporated mixed materials. All the shoes that were colorways he played in were full Durabuck including Carmine 6's