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 · Practiced Mastery
A pinball-platformer hybrid where flippers fling a mail-delivering beetle across an open island.

Execution · Practiced Mastery
A co-op horde shooter about sniping waves of occult Nazi undead.
Yoku's Island Express leans Execution (Practiced Mastery); Zombie Army 4: Dead War leans Execution (Practiced Mastery).
Zombie Army 4: Dead War leans a little harder on execution, though the gap is small.
Yoku's Island Express
Pinball flipper timing drives all traversal
Zombie Army 4: Dead War
Long-range headshots and horde crowd control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Yoku's Island Express
Solo, nothing models you
Zombie Army 4: Dead War
Undead waves never adapt
Zombie Army 4: Dead War leans a little harder on variance, though the gap is small.
Yoku's Island Express
Ball physics adds small bounce unpredictability
Zombie Army 4: Dead War
Spawn variation and elite placement shuffle runs
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Yoku's Island Express
Learning table layouts and exploration routes
Zombie Army 4: Dead War
Loadout perks, trap placement, score-chain knowledge
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.