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

Execution · Pure Mechanics
Arcade driving that tests cornering execution over a small set of memorisable tracks.

Execution · Pure Mechanics
A snowboarding sim testing precise trick execution and line memorization.
Need for Speed II leans Execution (Pure Mechanics); Shredders leans Execution (Pure Mechanics).
Shredders leans a little harder on execution, though the gap is small.
Need for Speed II
Cornering and throttle control decide every race
Shredders
Precise trick timing, balance and landing control dominate
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
Shredders
Mostly solo/coop, no adaptive opponent to predict
Shredders leans a little harder on variance, though the gap is small.
Need for Speed II
Tracks are fixed; nothing meaningful is hidden
Shredders
Slope conditions fixed, little randomness
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
Shredders
Learning lines and trick combos for score routes
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.