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

Execution · Practiced Mastery
A modern arcade flight game of high-speed dogfights, drones, and dramatic canyon runs.

Execution · Pure Mechanics
Arcade driving that tests cornering execution over a small set of memorisable tracks.
Ace Combat 7: Skies Unknown leans Execution (Practiced Mastery); Need for Speed II 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.
Ace Combat 7: Skies Unknown
Tight dogfighting and missile-dodge timing
Need for Speed II
Cornering and throttle control decide every race
Ace Combat 7: Skies Unknown leans a little harder on reads, though the gap is small.
Ace Combat 7: Skies Unknown
Campaign AI scripted; small PvP scene adds little
Need for Speed II
AI racers follow rubber-banded scripts, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ace Combat 7: Skies Unknown
Cloud cover gimmicks are learnable
Need for Speed II
Tracks are fixed; nothing meaningful is hidden
Ace Combat 7: Skies Unknown leans a little harder on optimization, though the gap is small.
Ace Combat 7: Skies Unknown
Aircraft tree and loadout routing matter
Need for Speed II
Learning six tracks' racing lines and car choice
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.