head to head
Neither is simply harder - they are hard in different places. Fruit Ninja demands more variance; Super Mario World demands more optimization.

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

Execution · Pure Mechanics
Precise jump execution across fixed levels with secrets to memorise.
Fruit Ninja leans Execution (Pure Mechanics); Super Mario World 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
Super Mario World
Perfect inputs trivialise every jump, spin and cape flight
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
Super Mario World
Scripted Koopas adapt to nothing
Fruit Ninja leans clearly harder on variance.
Fruit Ninja
Random fruit and bomb spawns
Super Mario World
Levels are fixed; nothing hidden survives one playthrough
Super Mario World leans clearly harder on optimization.
Fruit Ninja
Combo and crit systems are shallow but real
Super Mario World
Secret exits and route knowledge add a modest solvable layer
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.