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
Open-world western about an outlaw forced to hunt down his old gang.

Execution · Practiced Mastery
An open-world cop game where a reformed criminal polices Manhattan clean or dirty.
Red Dead Redemption leans Execution (Practiced Mastery); True Crime: New York 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.
Red Dead Redemption
Dead Eye softens but gunplay still wants aim
True Crime: New York City
Driving, shooting, and martial-arts brawling in one kit
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption
Multiplayer skirmishes add light human prediction
True Crime: New York City
Criminals and informants act on scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption
Ambient events and spawns vary mildly
True Crime: New York City
Random street crimes inject mild unpredictability
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption
Mission approaches and economy are learnable
True Crime: New York City
Precinct progression and good-versus-dirty cop systems are learnable
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.