head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
Inertial piloting and shot timing under escalating debris - an execution test from 1981.

Execution · Pure Mechanics
A rally racer where mastering precise car control against tricky terrain is everything.
Asteroids Deluxe leans Execution (Pure Mechanics); Colin McRae: Dirt 2 leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Asteroids Deluxe
Thrust-and-rotate piloting under swarming debris is pure motor skill
Colin McRae: Dirt 2
precise rally driving and braking required
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Asteroids Deluxe
Killer satellites home but follow fixed logic
Colin McRae: Dirt 2
no adaptive opponents, mostly time trials
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Asteroids Deluxe
Asteroid break trajectories add modest unpredictability
Colin McRae: Dirt 2
weather and surface conditions vary
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Asteroids Deluxe
Shield management and lurking strategies are learnable score tech
Colin McRae: Dirt 2
car tuning and racing lines solvable
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.