I think there is a good chance you would need to get an extra hole punched on the leather single tours. I wear the leather single tours on the smallest hole and the Toile H on the second smallest hole.Received my 41mm Toile H today! (And the eBay and Apple Pay credits hit too!)
So, it seems that it fits best on me on the smallest hole. I'm a bit surprised, if only because the Bridon double tour is almost too small. If I ever bought one of the leather single tours, I wonder if I'd have to punch a hole in it... just sort of unexpected.