head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
A block-breaker testing paddle precision and reaction against accelerating ball physics.

Execution · Pure Mechanics
Player-made platforming gauntlets where precision execution meets unseen level design.
Arkanoid DS leans Execution (Pure Mechanics); Super Mario Maker 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.
Arkanoid DS
Precise paddle control to keep the ball alive
Super Mario Maker
Community kaizo levels push platforming precision to extremes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Arkanoid DS
Solo block-breaker, no opponent to model
Super Mario Maker
Levels are static once built; nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Arkanoid DS
Power-up drops are randomized each play
Super Mario Maker
Unknown user levels are hidden information until attempted
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arkanoid DS
Brick-clearing order and angles reward planning
Super Mario Maker
Mastering tool tech and level conventions is learnable
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.