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

Optimization · Practiced Mastery
Expanded machine combat with broader build systems and traversal tools.

Execution · Practiced Mastery
Open-world western about an outlaw forced to hunt down his old gang.
Horizon Forbidden West leans Optimization (Practiced Mastery); Red Dead Redemption 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.
Horizon Forbidden West
Faster combat with valor surges and aiming.
Red Dead Redemption
Dead Eye softens but gunplay still wants aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Forbidden West
Machines remain scripted, not adaptive.
Red Dead Redemption
Multiplayer skirmishes add light human prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Forbidden West
Loot rolls and patrol RNG light.
Red Dead Redemption
Ambient events and spawns vary mildly
Horizon Forbidden West leans a little harder on optimization, though the gap is small.
Horizon Forbidden West
Deeper gear, weapon techniques, machine weaknesses.
Red Dead Redemption
Mission approaches and economy 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.