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
A cinematic action adventure testing serviceable combat timing along a fixed story path.

Execution · Practiced Mastery
Open-world superhero game whose joy is fluid web-swinging and rhythmic combat.
Enslaved: Odyssey to the West Premium Edition leans Execution (Practiced Mastery); Marvel's Spider-Man 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.
Enslaved: Odyssey to the West Premium Edition
Staff combat and traversal need moderate timing
Marvel's Spider-Man
swinging flow and combat dodge timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Enslaved: Odyssey to the West Premium Edition
Mech enemies attack in fixed scripted patterns
Marvel's Spider-Man
thugs and bosses follow fixed patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Enslaved: Odyssey to the West Premium Edition
A linear journey with little hidden
Marvel's Spider-Man
open world is fully discoverable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Enslaved: Odyssey to the West Premium Edition
Upgrade picks and encounter approaches add light depth
Marvel's Spider-Man
gadget loadouts and suit mods are shallow but present
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.