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
Tower-defense loadout math wearing an Adventure Time crossover costume.

Optimization · Pure Optimization
A farm-life sim solved by season routing and profit optimization.
Bloons Adventure Time TD leans Optimization (Pure Optimization); Stardew Valley 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.
Bloons Adventure Time TD
Tower placement and occasional ability taps
Stardew Valley
Trivial timing on fishing and combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bloons Adventure Time TD
Bloon rushes follow fixed wave scripts
Stardew Valley
No adaptive opponent exists
Stardew Valley leans a little harder on variance, though the gap is small.
Bloons Adventure Time TD
Character trinket drops add light collection RNG
Stardew Valley
Crop luck and geode RNG matter modestly
Stardew Valley leans a little harder on optimization, though the gap is small.
Bloons Adventure Time TD
Hero, allies and trinket loadout math drives every map
Stardew Valley
Routing seasons, profit loops, and bundles dominates
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.