head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Execution · Pure Mechanics
A swipe-em-up arcade game where slicing accuracy against random fruit spawns is the whole skill.

Execution · Pure Mechanics
A frantic endless runner with retro arcade style.
Fruit Ninja leans Execution (Pure Mechanics); Geki Yaba Runner: Anniversary Edition 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.
Fruit Ninja
Swipe accuracy and combo timing
Geki Yaba Runner: Anniversary Edition
fast reflex timing for endless running
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fruit Ninja
No opponent
Geki Yaba Runner: Anniversary Edition
no opponent, solo endless runner
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fruit Ninja
Random fruit and bomb spawns
Geki Yaba Runner: Anniversary Edition
procedural obstacle generation
Geki Yaba Runner: Anniversary Edition leans a little harder on optimization, though the gap is small.
Fruit Ninja
Combo and crit systems are shallow but real
Geki Yaba Runner: Anniversary Edition
minor route/upgrade optimization
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.