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

Execution · Pure Mechanics
A punishing retro platformer where precise jump timing is everything.
Boson X leans Execution (Pure Mechanics); Hudson's Adventure Island 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
Hudson's Adventure Island
tight platform jumps, brutal timing windows
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
Hudson's Adventure Island
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.
Boson X
Platform sequences are randomized but pattern-bounded
Hudson's Adventure Island
fruit/egg drops randomized
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Boson X
Blue-platform risk choices have a thin strategic layer
Hudson's Adventure Island
level route and skateboard memorization
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.