I haven't tried Havana, Peter, so can't say. But Montana PdH, imo, is pretty much one of the best creations of male perfumery. It's just gorgeous all...
I own this too. It's an interesting dry chypre-type masculine dandy vibe similar to old Crown, Penhaligon's, and Trumper's perfumes from this period...
I think they were co-promotions, in an attempt to sell actress Juliette Greco as a singer. I thought her name rang a faint bell with me, but I guess...