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 pure reflex runner of split-second jumps inside a rotating particle accelerator.

Execution · Pure Mechanics
An early arcade climber demanding tight, repeatable jump execution.
Boson X leans Execution (Pure Mechanics); Donkey Kong Junior 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.
Boson X
Split-second jumps in a rotating tunnel are the entire game
Donkey Kong Junior
precise vine-climbing and jump timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Boson X
No opponent - just oncoming geometry
Donkey Kong Junior
enemies follow fixed patrol patterns
Boson X leans a little harder on variance, though the gap is small.
Boson X
Platform sequences are randomized but pattern-bounded
Donkey Kong Junior
minor enemy timing variance
Boson X leans a little harder on optimization, though the gap is small.
Boson X
Blue-platform risk choices have a thin strategic layer
Donkey Kong Junior
minimal route memorization needed
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.