head to head
Micro Machines 2: Turbo Tournament asks more than Half-Life 2, and the gap is reads.

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

Execution · Pure Mechanics
Twitchy miniature racing where screen-edge duels punish imprecise hands.
Half-Life 2 leans Execution (Pure Mechanics); Micro Machines 2: Turbo Tournament leans Execution (Pure Mechanics).
Micro Machines 2: Turbo Tournament leans a little harder on execution, though the gap is small.
Half-Life 2
Gravity gun and shooting demand precision.
Micro Machines 2: Turbo Tournament
Twitchy top-down handling on tabletop tracks is the core test
Micro Machines 2: Turbo Tournament leans clearly harder on reads.
Half-Life 2
Combine AI scripted, non-adaptive.
Micro Machines 2: Turbo Tournament
Screen-edge duels reward predicting human rivals' lines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Almost no randomness.
Micro Machines 2: Turbo Tournament
Tracks fixed, almost nothing random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Half-Life 2
Linear progression with no builds.
Micro Machines 2: Turbo Tournament
Memorising shortcuts and racing lines per track
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.