I've only tried a sample of the fragrance, so I can't speak to the rest of the line, but I generally find that dirt and mineral notes read as way stronger in shave soap scents than they do in an aftershave. I wonder if that's what you're picking up here.
My shipment just came in with the sample of the EdP and shave soap (along with the towel). I'll be trying the soap later today for my SotD. I'm liking the EdP (sprayed some on my arm to test). I'll give it a fun run next week, but I may end up buying a full bottle.