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
Strategic dismemberment under resource pressure, solved by upgrade planning and practiced limb-aiming.
Execution · Practiced Mastery
A maze shooter about navigating a tomb, collecting keys and dodging creatures.
Dead Space (2008) leans Execution (Practiced Mastery); Tutankham 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.
Dead Space (2008)
Precise limb-targeting under Necromorph pressure is the core skill
Tutankham
Shooting horizontally and dodging creatures needs reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Necromorphs follow fixed approach patterns, not player modelling
Tutankham
Creatures are scripted, not adaptive opponents
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Store stock is deterministic; minor drop variance on kills
Tutankham
Enemy spawns add minor unpredictability
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Weapon upgrading, power-node routing and stasis timing are optimisable
Tutankham
Memorizing maze layouts and key routes is essential
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.