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 frantic endless runner with retro arcade style.

Execution · Pure Mechanics
A punishing retro platformer where precise jump timing is everything.
Geki Yaba Runner: Anniversary Edition leans Execution (Pure Mechanics); Hudson's Adventure Island leans Execution (Pure Mechanics).
Hudson's Adventure Island leans a little harder on execution, though the gap is small.
Geki Yaba Runner: Anniversary Edition
fast reflex timing for endless running
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.
Geki Yaba Runner: Anniversary Edition
no opponent, solo endless runner
Hudson's Adventure Island
fixed enemy patterns, no adaptation
Geki Yaba Runner: Anniversary Edition leans a little harder on variance, though the gap is small.
Geki Yaba Runner: Anniversary Edition
procedural obstacle generation
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.
Geki Yaba Runner: Anniversary Edition
minor route/upgrade optimization
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.