GTA V was one of the best games ever but there are 3 things that Mafia 3 does better.
1. Stealth - I was pleasantly suprised how good the stealth was throughout the game. Some of best stealth in a open world game. Didn't really exist in GTA V. Mafia 3 gives you options to either go shoot em up,stealth or both.
2. Combat - Great combat and cover system. This was never GTA's forte. Mafia 3 makes you feel like a badazz with the shotee or silencer(hand gun/automatic).
3. Interior Buildings and Design - Probably the most underrated aspect of Mafia 3. From the Hotel to the Casino to the Prositution HQ in the French Ward, Mafia has the most interior buildings in an open world game that I've experienced. And the design throughout them can be awe inspiring at times. Whether you're on main mission or side missions, there are plenty of different buildings to navigate through. The lack of interior buildings was one of my biggest complaints with GTA V.
Top 3 Favorite Locations in Mafia 3.
1. The Bayou
2. French Ward
3. Downtown