head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Optimization · Practiced Mastery
Revenge-driven open-worlder dismantling a sixties crime empire district by district.

Optimization · Practiced Mastery
An open-world crime game where managing a criminal empire's territory is the deeper system.
Mafia III leans Optimization (Practiced Mastery); The Godfather II leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia III
Stealth takedowns and gunfights
The Godfather II
shooting and brawling need moderate skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia III
Racket guards follow fixed AI
The Godfather II
scripted rival families, no adaptation
The Godfather II leans a little harder on variance, though the gap is small.
Mafia III
Open world is static
The Godfather II
territory events and drops vary
The Godfather II leans a little harder on optimization, though the gap is small.
Mafia III
District takeover loop and underboss assignments
The Godfather II
empire management and territory control solvable
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.