head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
More giant clockwork sandboxes where mapping NPC schedules is the real skill.

Optimization · Pure Optimization
Sandbox assassination at its purest: stage the perfect accident and walk away.
Hitman 2 (2018) leans Optimization (Pure Optimization); Hitman: Blood Money 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 2 (2018)
Minimal dexterity needed with a solid plan
Hitman: Blood Money
Modest aim and sneak demands once a plan exists
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hitman 2 (2018)
Clockwork NPC loops, nothing adapts
Hitman: Blood Money
Crowds and guards run fixed routines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hitman 2 (2018)
Mission stories hidden until explored
Hitman: Blood Money
Accident opportunities hidden until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hitman 2 (2018)
Routing, disguises, and unlocks converge on solved runs
Hitman: Blood Money
Accident-kill routing is a near-solvable planning puzzle
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.