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
Sandbox assassination at its purest: stage the perfect accident and walk away.

Optimization · Pure Optimization
Procedural space exploration sandbox with crafting depth.
Hitman: Blood Money leans Optimization (Pure Optimization); No Man's Sky 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.
Hitman: Blood Money
Modest aim and sneak demands once a plan exists
No Man's Sky
Light shooter and flight inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hitman: Blood Money
Crowds and guards run fixed routines
No Man's Sky
Mostly solo, sparse PvP
No Man's Sky leans a little harder on variance, though the gap is small.
Hitman: Blood Money
Accident opportunities hidden until discovered
No Man's Sky
Procedural planets and loot
Hitman: Blood Money leans a little harder on optimization, though the gap is small.
Hitman: Blood Money
Accident-kill routing is a near-solvable planning puzzle
No Man's Sky
Base, freighter, expedition progression
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.