Depends on the disk controller. wozfdc attempts to algorithmically identify the sector order by matching known boot sectors, and that's what the apple3 driver uses. On apple2/2p/2e the same applies. On the IIgs, and on earlier IIs if you use "-sl6 diskii", it does use the file extension to determine the sector order.

robj: is that disc image available someplace? I can add it to the heuristics.