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
Open-world racing testing car control and line discipline with light tuning underneath.

Execution · Pure Mechanics
Arcade driving that tests cornering execution over a small set of memorisable tracks.
Forza Horizon 2 leans Execution (Pure Mechanics); 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.
Forza Horizon 2
Racing lines, braking points and car control lead everything
Need for Speed II
Cornering and throttle control decide every race
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 2
Drivatar AI mimics styles but stays effectively scripted
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.
Forza Horizon 2
Weather shifts grip slightly; courses are fully known
Need for Speed II
Tracks are fixed; nothing meaningful is hidden
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 2
Car tuning and route knowledge reward preparation
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.