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

Execution · Pure Mechanics
Landmark FPS built on physics puzzles and tight gunplay.

Execution · Pure Mechanics
Co-op physics party game about chaining grabbed hands across deadly gaps.
Half-Life 2 leans Execution (Pure Mechanics); Heave Ho leans Execution (Pure Mechanics).
Heave Ho leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Heave Ho
Grip timing and swing physics under chaos
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Combine AI scripted, non-adaptive.
Heave Ho
Friends sabotage, but it is party chaos
Heave Ho leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Heave Ho
Physics wobble creates slapstick
Half-Life 2 leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Heave Ho
Levels are short and shallow to route
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.