Well, that was my best guess. The colors seem to match. I don't think he'd wear anything less than the SHB 90s. Also, the picture quality and the angles might obscure them, since they're (the claws) not entirely that large.
and the "power cushion logo" near the end of the shoe is a lot farther away from the bottom of the "YY" logo too. yeah, i don't think he'd be wearing "lower end" shoes, but they dont' match any of the newer shoes either. thats why i figured it might of been a prototype shoe that yonex wanted him to try.