Thanks for the Dhavedash recommendation. Placed an order which had now arrived. Looking forward to trying out my MDC samplesThey all perform the same so it's entirely down to your taste in scents.
Original is lavender - It's very strong and smells like a tar roof to me.
Fougere is "fern like" - Widely accepted as one of the best shaving soap fougeres available.
Rose is a mixture of rose and benzoin - The benzoin resin imparts something which spoils the scent for me.
Vetiver is, well, vetiver! Dirty Haitian grass scent.
Agrumes is citrus, the only one I've not tried for fear of Arko style citronella.
I would strongly advise buying a sample of each from Shavedash before spending out on a 200g jar as the scents are not universally loved. My personal favourite is vetiver but I have to be in the mood for it.