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
Linear postwar crime story driven by cover shootouts and atmosphere.

Execution · Practiced Mastery
A linear stealth platformer testing patience with intended climbing routes.
Mafia II leans Execution (Practiced Mastery); The Lord of the Rings: Gollum 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 II
Cover shooting and fistfight timing
The Lord of the Rings: Gollum
Climbing and stealth timing are loose and forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia II
Enemies are scripted
The Lord of the Rings: Gollum
Orc patrols loop fixed routes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia II
Story missions are fixed
The Lord of the Rings: Gollum
Levels are static once seen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mafia II
Modest; learning encounter layouts
The Lord of the Rings: Gollum
Stealth paths have clear intended solutions
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.