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

Optimization · Pure Optimization
Budgeting steam movement and loadouts against hidden but scripted alien positions.

Optimization · Pure Optimization
Sitcom puzzle game about rigging perfect prank chains around a fixed routine.
Code Name S.T.E.A.M. leans Optimization (Pure Optimization); Neighbours from Hell 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.
Code Name S.T.E.A.M.
Manual third-person aiming adds a real but small hands layer
Neighbours from Hell
Timing pranks between patrol windows
Code Name S.T.E.A.M. leans a little harder on reads, though the gap is small.
Code Name S.T.E.A.M.
Alien AI runs fixed behaviours, never modelling you
Neighbours from Hell
The neighbour loops a fixed routine
Code Name S.T.E.A.M. leans a little harder on variance, though the gap is small.
Code Name S.T.E.A.M.
Unseen enemy positions and overwatch threats are hidden information
Neighbours from Hell
Routine unknown on first attempt, then converges
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Code Name S.T.E.A.M.
Steam budgeting, loadouts and positioning are the solvable core
Neighbours from Hell
Sequencing pranks for maximum combo rating
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.