Wow, I have both of these games, although I only played the second a little bit and quit because it wasn't anything like the original.
Gansters was so fun, but nearly impossible! I could never get enough mobsters recruited to attack the rivals gangs. I might have to get this game out and play it again.
I remember very little about the second game, but I remember that it didn't allow you the freedom that the first gave you. You had to follow some sort of a story line, whereas the original let you take over any neighborhood and businesses you wanted, and you could recruit any men you wanted depending on their skills.
I didn't know anyone else played these games!