The major differences between this hat is in the crown.
The fedora #1 has 3 points at the back of the crown but the Havana has a teardrop shape and has a rather level apearance to the crown. Another difference is the side dents are a little larger on the Havana making this hat what I would consider a bolder look.
Let me explain what I mean buy bolder. The fedora has soft looking rounded corners, on the other hand the Havana has sharper corners Sharper larger dents with a flat valley tear drop crown, not like the rounded valley of the fedora #1 crown.