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
Arcade driving that tests cornering execution over a small set of memorisable tracks.

Execution · Pure Mechanics
Input precision across five fixed skateboarding events with learnable optimal lines.
Need for Speed II leans Execution (Pure Mechanics); Skate or Die 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.
Need for Speed II
Cornering and throttle control decide every race
Skate or Die
Joystick precision on ramps, jumps and races decides every event
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed II
AI racers follow rubber-banded scripts, not minds
Skate or Die
Pool joust against another human adds slight prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed II
Tracks are fixed; nothing meaningful is hidden
Skate or Die
Courses are fixed; nothing hidden after a few runs
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed II
Learning six tracks' racing lines and car choice
Skate or Die
Learning each event's optimal lines and trick values raises scores
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.