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

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

Optimization · Pure Optimization
Optimising tower placement, research and economy against scripted alien waves.
Neighbours from Hell leans Optimization (Pure Optimization); Revenge of the Titans 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
Revenge of the Titans
Mid-wave building rewards speed but never twitch-defines outcomes
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
Revenge of the Titans
Titan waves follow set paths without adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Neighbours from Hell
Routine unknown on first attempt, then converges
Revenge of the Titans
Wave compositions are unknown on a first campaign run
Revenge of the Titans leans a little harder on optimization, though the gap is small.
Neighbours from Hell
Sequencing pranks for maximum combo rating
Revenge of the Titans
Tech choices, placement and economy are 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.