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 point-and-click adventure where inventory puzzle logic is the whole challenge.

Optimization · Light / Casual
Tests very little mechanically - a dark authored story carried by light RPG battles.
Broken Sword: The Smoking Mirror leans Optimization (Light / Casual); Wadanohara and the Great Blue Sea 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.
Broken Sword: The Smoking Mirror
no physical skill, point-and-click
Wadanohara and the Great Blue Sea
Top-down walking and menu battles need no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Broken Sword: The Smoking Mirror
no opponents, puzzle-driven
Wadanohara and the Great Blue Sea
Story characters never adapt to the player
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Broken Sword: The Smoking Mirror
no meaningful randomness
Wadanohara and the Great Blue Sea
Plot twists are authored, not random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Broken Sword: The Smoking Mirror
item puzzle logic is solvable
Wadanohara and the Great Blue Sea
Simple RPG battles and light puzzles barely resist
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.