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

Execution · Pure Mechanics
A test of fast, precise shooting and map navigation against scripted but relentless enemies.

Execution · Pure Mechanics
A driving-combat arcade classic where an armed spy car battles enemy vehicles down endless highways.
Doom (1993) leans Execution (Pure Mechanics); Spy Hunter 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.
Doom (1993)
Precise movement and shooting against relentless enemy pressure
Spy Hunter
High-speed weaving, ramming, and weapon timing demand sharp hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Doom (1993)
Enemies follow scripted patrol and attack patterns, not adaptive
Spy Hunter
Enemy vehicles attack on fixed behaviours.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Doom (1993)
Enemy placement is fixed but unknown on first run through levels
Spy Hunter
Traffic and enemy mix vary each run.
Doom (1993) leans a little harder on optimization, though the gap is small.
Doom (1993)
Level routing and resource management determine survival efficiency
Spy Hunter
Weapon-van timing and road knowledge are learnable.
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.