I know when I tested this for the first time last month, it did seem a lot like Montana Parfum d'Homme (red box), but today, I wore it alone. Not side by side with Montana, and they are most definitely different. Havana has a bit more of something, perhaps it's the tobacco? Something darker. Strong smelling, too. Almost like someone spilled a little Rochas Macassar in it or something. I gotta say, I like the citrusy opening of Montana a little better. The drydown is different too. Similar, but different. I think I get more sandalwood from Havana, and the tobacco too, if that's what it is.
It's wearable, but it most definitely is not me.
The odd thing is, I got an unusual amount of attention from the husband today, and none of the usual, "What is that horrible smell!?" So I'm not complaining.