FF6 Steam Version

This is only assumptions, we can't know until someone crack the blob. I've read somewhere else that FFV (iOS) use binary file format for graphics while FFVI (iOS) use flb file format, so there's chance FFVI (PC) doesn't use the same file formats as FFV (PC).

It's actually the other way around; FFV stores all of it's graphics and music as FLB, whereas FFVI's stuff is all stored as one gigantic binary blob of file type OBB.