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

Optimization · Pure Optimization
The genre-defining cartoon tower defense with crunchy upgrades and fixed waves begging for perfect solutions.

Optimization · Pure Optimization
A block-pulling puzzle game about solving deterministic 3D climbing puzzles.
Kingdom Rush leans Optimization (Pure Optimization); Pushmo World leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Rush
Light micro of hero and rally points
Pushmo World
Pulling and climbing blocks demands no precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Rush
Wave compositions are fixed and previewable
Pushmo World
Solo puzzle game with no opponent
Kingdom Rush leans a little harder on variance, though the gap is small.
Kingdom Rush
Almost fully deterministic waves
Pushmo World
Puzzles fully deterministic, nothing hidden randomly
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Rush
Tower placement and upgrade routes are solvable
Pushmo World
Working out the pull sequence to climb is the whole game
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.