head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Thirties crime drama of authored missions and unforgiving period driving.

Execution · Practiced Mastery
A deliberately paced shooter testing easy aim and light build choices in scripted missions.
Mafia leans Execution (Practiced Mastery); RoboCop: Rogue City leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia
Punishing shootouts and the infamous race
RoboCop: Rogue City
Deliberate aiming with a tanky hero, light demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia
Cops and gangsters follow scripts
RoboCop: Rogue City
Criminal AI runs simple fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia
Missions are fully authored
RoboCop: Rogue City
Linear missions hold little hidden or random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia
Learning mission layouts and car handling
RoboCop: Rogue City
Skill points and pistol upgrades structure modest build planning
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.