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
Uncovering a fixed murder mystery through inventory puzzles and deduction.

Optimization · Pure Optimization
Investigative puzzle-solving through dialogue and clue cross-referencing in a fixed story.
Still Life leans Optimization (Pure Optimization); The Blackwell Epiphany 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.
Still Life
Pointing and clicking carries no physical demand
The Blackwell Epiphany
Pointing and clicking carries no physical ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Still Life
The killer is a fixed narrative, not an adapting opponent
The Blackwell Epiphany
A fixed narrative with no adaptive adversary
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Still Life
The mystery's facts are hidden until uncovered
The Blackwell Epiphany
Clues are scripted-but-unknown until investigated
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Still Life
Inventory puzzles and deduction steps have fixed solutions
The Blackwell Epiphany
Cross-referencing names and notebook leads solves every case
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.