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

Optimization · Light / Casual
A zero-gravity narrative mystery told by scrubbing through holographic recordings of a space station crew.

Optimization · Light / Casual
A first-person mystery set in a snowed-in hotel, driven entirely by exploration and phone calls.
Tacoma leans Optimization (Light / Casual); The Suicide of Rachel Foster leans Optimization (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Tacoma
Exploration only; no dexterity demands.
The Suicide of Rachel Foster
Walking a hotel; no dexterity test.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Tacoma
No opponent; you replay recorded crew conversations.
The Suicide of Rachel Foster
No opponent; a phone companion guides you.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Tacoma
Story is fixed; nothing hidden behind randomness.
The Suicide of Rachel Foster
Fixed mystery; nothing randomised.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Tacoma
Piecing the timeline together takes light deduction.
The Suicide of Rachel Foster
Light navigation and clue-following through the hotel.
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.