As I've elaborated above, it certainly isn't navy boots I'll just post some more angles on the TIE boots, just for the hell of it. I think they're remarkably close, in shape of the boot's upper, heel placement, no-tread/subtle tread soles, shaft height, etc.
Oh and one more thing: The flap with the adjustment strap? Not all of the Ferrix Troopers actually have that. Like all recent productions, whatever boots are available are used.
Also what the hell is going on with this boot?