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
Tests deductive puzzle-solving through fixed adventure-game logic chains.

Optimization · Pure Optimization
Methodical clue-gathering and inventory logic through a gothic mystery.
Secrets of the Ark: A Broken Sword Game leans Optimization (Pure Optimization); The Black Mirror 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.
Secrets of the Ark: A Broken Sword Game
Point-and-click input with generous action timers
The Black Mirror
Point-and-click pacing has zero dexterity demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Secrets of the Ark: A Broken Sword Game
No opponent of any kind to predict
The Black Mirror
The gothic cast follows a fixed script
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Secrets of the Ark: A Broken Sword Game
Puzzle solutions are hidden information until discovered
The Black Mirror
Clues are scripted-but-unknown until found
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Secrets of the Ark: A Broken Sword Game
Every puzzle has one fixed solvable answer
The Black Mirror
Inventory logic and dialogue chains are solvable puzzles
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.