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
Aiming at bloon waves while solving a tower-defense upgrade economy first-person.

Execution · Practiced Mastery
Navigating maze-like levels and steady shooting against scripted prehistoric enemies.
Apes vs Helium leans Execution (Practiced Mastery); Turok: Dinosaur Hunter 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.
Apes vs Helium
An aimbot popping every bloon would trivialise the waves
Turok: Dinosaur Hunter
Platforming and aiming in fog-bound levels demand steady hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Apes vs Helium
Bloons follow fixed tracks, nothing adapts
Turok: Dinosaur Hunter
Dinosaurs and soldiers run fixed attack routines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Apes vs Helium
Wave composition is learnable, little stays hidden
Turok: Dinosaur Hunter
Sprawling maze levels hide keys until explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Apes vs Helium
Upgrade and class economy against known waves is solvable
Turok: Dinosaur Hunter
Route knowledge through the mazes is the real progress
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.