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

Execution · Pure Mechanics
A boss-rush action game that is nothing but execution tests against scripted duelists.

Execution · Pure Mechanics
A tilt-control balance game about rolling precisely through floating mazes.
Furi leans Execution (Pure Mechanics); Super Monkey Ball 3D 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.
Furi
Parry timing, bullet dodging, and duel precision
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.
Furi
Bosses are scripted patterns, however adversarial they feel
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.
Furi
Fixed boss sequences
Super Monkey Ball 3D
Levels are fixed with little randomness
Furi leans a little harder on optimization, though the gap is small.
Furi
Learning each boss's phases converges to mastery
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.