no while both are essentially straight cuts, they do fit differently. It's most noticeable in the top block where the 47 feels trimmer with more tapered waist. the 46 is a little more anti-fit in shape and has the obvious design quirks. the 46 fabric feels noticeably rougher and uneven than the 47 which is more uniform and has a smoother hand. I'm no expert in vintage but from what I've read and heard from sugar cane, the wartime fabrics were a little lighter in weight than the post war fabrics.