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.

Execution · Practiced Mastery
A massive open-world sandbox built around grappling-hook and parachute chaos.

Execution · Practiced Mastery
Linear postwar crime story driven by cover shootouts and atmosphere.
Just Cause 2 leans Execution (Practiced Mastery); Mafia II 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.
Just Cause 2
Grapple-parachute flow rewards handling skill
Mafia II
Cover shooting and fistfight timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Just Cause 2
Enemy AI never adapts
Mafia II
Enemies are scripted
Just Cause 2 leans a little harder on variance, though the gap is small.
Just Cause 2
Sandbox chaos varies moment to moment
Mafia II
Story missions are fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Just Cause 2
Chaos-point economy and settlement completion routing
Mafia II
Modest; learning encounter layouts
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.