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 · Pure Optimization
Zen sliding-droplet puzzler about clearing pearls in the fewest moves.

Optimization · Pure Optimization
A first-person puzzler on Europa where you route energy orbs through chambers while debating machine consciousness.
Quell leans Optimization (Pure Optimization); The Turing Test 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.
Quell
Swipes only; no timing pressure
The Turing Test
No dexterity pressure at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Quell
No opponent exists
The Turing Test
No opponent, only puzzles
The Turing Test leans a little harder on variance, though the gap is small.
Quell
Fully deterministic boards
The Turing Test
Solutions hidden only until discovered
Quell leans a little harder on optimization, though the gap is small.
Quell
Minimum-move sliding solutions are pure logic
The Turing Test
Each energy-orb chamber has a fixed solution
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.