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 precision marble-rolling platformer focused on time trials.

Execution · Pure Mechanics
A classic 2D Mario platformer rewarding tight jump execution above all.
Marble It Up! Ultra leans Execution (Pure Mechanics); New Super Mario Bros. U Deluxe leans Execution (Pure Mechanics).
Marble It Up! Ultra leans a little harder on execution, though the gap is small.
Marble It Up! Ultra
precise marble physics control is everything
New Super Mario Bros. U Deluxe
precise jump and platforming execution
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marble It Up! Ultra
no opponent, solo time-trial skill
New Super Mario Bros. U Deluxe
fixed enemy patterns, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Marble It Up! Ultra
deterministic physics, minimal randomness
New Super Mario Bros. U Deluxe
minor enemy placement randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Marble It Up! Ultra
route optimization for best times
New Super Mario Bros. U Deluxe
level routing for speed/collectibles
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.