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 · Systems & Chaos
Sifting a found phone's hidden contents to assemble one fixed mystery.

Optimization · Pure Optimization
A LucasArts sci-fi adventure where astronauts stranded on an alien world puzzle out its dead civilization.
Simulacra leans Optimization (Systems & Chaos); The Dig 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.
Simulacra
Tapping through a phone interface
The Dig
Point-and-click; no reflex demands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Simulacra
The entity is scripted horror, not an adapting mind
The Dig
Alien world is static; companions follow scripts.
Simulacra leans a little harder on variance, though the gap is small.
Simulacra
The mystery is hidden information uncovered once
The Dig
Alien machinery's purpose is hidden until experimented with.
The Dig leans a little harder on optimization, though the gap is small.
Simulacra
Piecing clues from texts and apps is the whole test
The Dig
Machine puzzles have single fixed solutions to deduce.
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.