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
A tilt-control balance game about rolling precisely through floating mazes.

Execution · Pure Mechanics
Classic Tetris execution under audiovisual flow, speed still decides everything.
Super Monkey Ball 3D leans Execution (Pure Mechanics); Tetris Effect leans Execution (Pure Mechanics).
Super Monkey Ball 3D leans a little harder on execution, though the gap is small.
Super Monkey Ball 3D
Precise tilt control under gravity is the entire test
Tetris Effect
Piece placement under speed and Zone timing is the whole test
Super Monkey Ball 3D leans a little harder on reads, though the gap is small.
Super Monkey Ball 3D
Solo stages, no opponent to predict
Tetris Effect
Solo experience with no opponent to model
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Monkey Ball 3D
Levels are fixed with little randomness
Tetris Effect
Randomised bag is bounded and quickly mappable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Monkey Ball 3D
Optimal lines through mazes reward route learning
Tetris Effect
Stacking theory and Zone usage have known optimal lines
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.