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.

Optimization · Pure Optimization
A deep tower defense about popping waves of balloons with monkey towers.

Optimization · Pure Optimization
A tower defense game built on optimal placement and build strategy.
Bloons TD 6 leans Optimization (Pure Optimization); Kingdom Rush 5: Alliance leans Optimization (Pure Optimization).
Kingdom Rush 5: Alliance leans a little harder on execution, though the gap is small.
Bloons TD 6
Placement clicks only; no dexterity ceiling
Kingdom Rush 5: Alliance
minor click-timing for abilities
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bloons TD 6
Bloon waves are fixed and known
Kingdom Rush 5: Alliance
fixed enemy waves, no adaptation
Kingdom Rush 5: Alliance leans a little harder on variance, though the gap is small.
Bloons TD 6
Wave order is deterministic; tiny targeting randomness
Kingdom Rush 5: Alliance
minor spawn/damage randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Bloons TD 6
Tower placement, upgrades, and economy are near-solvable
Kingdom Rush 5: Alliance
tower placement, build 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.