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
Time-loop assassin puzzle where each day refines the perfect chain.

Optimization · Pure Optimization
The GameCube remake of Metal Gear Solid, a scripted stealth gauntlet that rewards memorized routes.
Deathloop leans Optimization (Pure Optimization); Metal Gear Solid: The Twin Snakes 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.
Deathloop
Gunplay and slab timing required.
Metal Gear Solid: The Twin Snakes
Boss fights and first-person aiming demand decent hands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Deathloop
Visionaries scripted; PvP invasions rare.
Metal Gear Solid: The Twin Snakes
Psycho Mantis only pretends to read you; all scripted.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Deathloop
Loadout drops and Julianna invasions randomize.
Metal Gear Solid: The Twin Snakes
Famous tricks are unknown once, then known forever.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Deathloop
Time-loop puzzle - chaining kills is solvable routing.
Metal Gear Solid: The Twin Snakes
Patrol routes and boss patterns converge to a solved run.
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.