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
Drift execution and learned racing lines through destructible city tracks.
Half-Life 2 leans Execution (Pure Mechanics); Ridge Racer Unbounded leans Execution (Pure Mechanics).
Ridge Racer Unbounded leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Ridge Racer Unbounded
Drift control and boost timing decide every race
Ridge Racer Unbounded leans a little harder on reads, though the gap is small.
Half-Life 2
Combine AI scripted, non-adaptive.
Ridge Racer Unbounded
Online rivals allow mild positional prediction
Ridge Racer Unbounded leans a little harder on variance, though the gap is small.
Half-Life 2
Almost no randomness.
Ridge Racer Unbounded
Destruction chaos adds modest track noise
Ridge Racer Unbounded leans a little harder on optimization, though the gap is small.
Half-Life 2
Linear progression with no builds.
Ridge Racer Unbounded
Learning racing lines and shortcut routes rewards study
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.