Another confusing polypore species pair...This polypore was growing on a decomposing oak log and while the upper surface looks slightly tomentose lake a Gilled Polypore (Trametes betulina), the underside looks especially thick with a more chaotic ' gill plate' arrangement, like I would expect from an Oak Mazegill (Daedalea quercina). @leptonia do you have an opinion on this one?