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 dual-stick coordination game testing split-brain control of two avatars at once.

Execution · Pure Mechanics
A classic 2D Mario platformer rewarding tight jump execution above all.
Entwined leans Execution (Pure Mechanics); New Super Mario Bros. U Deluxe leans Execution (Pure Mechanics).
New Super Mario Bros. U Deluxe leans a little harder on execution, though the gap is small.
Entwined
Steering two characters on separate sticks simultaneously is the whole test
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.
Entwined
No opponent - only flowing obstacle lanes
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.
Entwined
Patterns repeat predictably within each lifetime
New Super Mario Bros. U Deluxe
minor enemy placement randomness
New Super Mario Bros. U Deluxe leans a little harder on optimization, though the gap is small.
Entwined
Little to solve beyond reading upcoming gate colours
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.