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
An arcade FPS that scores you for killing enemies in the most creative ways possible.
Execution · Practiced Mastery
A maze shooter about navigating a tomb, collecting keys and dodging creatures.
Bulletstorm 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.
Bulletstorm
Leash, kick, and shot timing drive skillshot chains
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.
Bulletstorm
Enemies are scripted fodder for your combos
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.
Bulletstorm
Arenas and spawns are fixed and learnable
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.
Bulletstorm
Maximising skillshot score per arena is a solvable puzzle
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.