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
An elegant hex-grid logic puzzler that is always solvable by deduction alone, never guessing.

Optimization · Pure Optimization
Board-game distillation of Hitman into elegant fully-solvable turn puzzles.
Hexcells leans Optimization (Pure Optimization); Hitman Go 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.
Hexcells
Clicking hexes calmly; no physical test.
Hitman Go
Turn-based taps, zero dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hexcells
No opponent exists.
Hitman Go
Enemy pieces move on fixed deterministic rules
Hexcells leans a little harder on variance, though the gap is small.
Hexcells
Designed to need zero guessing; full information.
Hitman Go
All information visible on the board
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hexcells
Minesweeper-style pure deduction is the entire game.
Hitman Go
Each diorama is a literally solvable movement puzzle
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.