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
Sitcom puzzle game about rigging perfect prank chains around a fixed routine.

Optimization · Pure Optimization
A tower-defense game about placing traps along paths to protect baby monsters.
Neighbours from Hell leans Optimization (Pure Optimization); PixelJunk Monsters 2 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.
Neighbours from Hell
Timing pranks between patrol windows
PixelJunk Monsters 2
Some real-time placement timing under wave pressure.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Neighbours from Hell
The neighbour loops a fixed routine
PixelJunk Monsters 2
Enemy waves are scripted, not adaptive.
PixelJunk Monsters 2 leans a little harder on variance, though the gap is small.
Neighbours from Hell
Routine unknown on first attempt, then converges
PixelJunk Monsters 2
Wave composition adds some unpredictability.
PixelJunk Monsters 2 leans a little harder on optimization, though the gap is small.
Neighbours from Hell
Sequencing pranks for maximum combo rating
PixelJunk Monsters 2
Tower placement and upgrade paths are deeply solvable.
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.