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
Hitting braking points and managing weight transfer lap after deterministic lap.

Execution · Pure Mechanics
A tilt-control balance game about rolling precisely through floating mazes.
Need for Speed: Shift 2 Unleashed leans Execution (Pure Mechanics); Super Monkey Ball 3D leans Execution (Pure Mechanics).
Super Monkey Ball 3D leans a little harder on execution, though the gap is small.
Need for Speed: Shift 2 Unleashed
Braking points and weight transfer control define lap times
Super Monkey Ball 3D
Precise tilt control under gravity is the entire test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: Shift 2 Unleashed
AI drivers follow racing lines, humans rarely adapt deeply
Super Monkey Ball 3D
Solo stages, no opponent to predict
Super Monkey Ball 3D leans a little harder on variance, though the gap is small.
Need for Speed: Shift 2 Unleashed
Deterministic physics - the track never changes
Super Monkey Ball 3D
Levels are fixed with 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: Shift 2 Unleashed
Car setup tuning and line study underpin pace
Super Monkey Ball 3D
Optimal lines through mazes reward route learning
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.