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 · Practiced Mastery
Street racer with stylized arcade handling.

Execution · Practiced Mastery
MMO street racing testing driving lines plus grindable car-build advantage.
Need for Speed Unbound leans Execution (Practiced Mastery); Need for Speed: World leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed Unbound
Arcade drift and grip handling
Need for Speed: World
Racing lines, drift control and pursuit evasion reward clean hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed Unbound
Online lobbies, AI cops
Need for Speed: World
Human rivals in lobbies add slight positional 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 Unbound
Heat level and cop chase RNG
Need for Speed: World
Pursuit spawns and lobby skill add mild noise
Need for Speed Unbound leans a little harder on optimization, though the gap is small.
Need for Speed Unbound
Car build, betting strategy, garage growth
Need for Speed: World
Car builds, powerups and route knowledge compound advantage
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.