Mafia 2 had the potential to be similar masterpiece, but unfortunately to achieve it, another year of development was needed...and 2K was impatient, so they forced 2K Czech to gut the game, rip out half the content..for example whole melee combat system was gutted, the script was supposed to branch and have 4 different endings, missions were supposed to be lot longer and there was a lot of side content planned, all scrapped..
What remained in Mafia 2 was still great - the atmosphere was beautiful, the mission design was stellar. Shootouts very very well done, guns had great punch (that shotgun!), cars had, again, amazing physics (on sim setting). I loved playing it, but yeah it could have been so much more.
Aye you could tell mafia 2 was rushed the world felt pretty dead.
First one was amazing and on par with the GTA games at the time whilst having a better story