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 tower-defense game about placing traps along paths to protect baby monsters.

Optimization · Pure Optimization
Side-on turn-based tactics where you manually aim ricocheting bullets for a steambot pirate crew.
PixelJunk Monsters 2 leans Optimization (Pure Optimization); SteamWorld Heist leans Optimization (Pure Optimization).
SteamWorld Heist leans a little harder on execution, though the gap is small.
PixelJunk Monsters 2
Some real-time placement timing under wave pressure.
SteamWorld Heist
Manual aim and ricochet shots reward steady hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
PixelJunk Monsters 2
Enemy waves are scripted, not adaptive.
SteamWorld Heist
Enemy bots follow fixed behaviors
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
PixelJunk Monsters 2
Wave composition adds some unpredictability.
SteamWorld Heist
Procedural ship layouts and loot drops
PixelJunk Monsters 2 leans a little harder on optimization, though the gap is small.
PixelJunk Monsters 2
Tower placement and upgrade paths are deeply solvable.
SteamWorld Heist
Crew builds, weapon picks, and turn routing carry runs
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.