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
Scheduling and production-chain planning in a workshop economy with light combat.

Optimization · Pure Optimization
Touch-controlled DS Zelda centered on re-running a timed stealth dungeon ever faster.
My Time at Sandrock leans Optimization (Pure Optimization); The Legend of Zelda: Phantom Hourglass 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.
My Time at Sandrock
Light action combat never gates progress seriously
The Legend of Zelda: Phantom Hourglass
Stylus controls are simple and forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
My Time at Sandrock
Townsfolk and monsters run fixed routines
The Legend of Zelda: Phantom Hourglass
Phantoms patrol fixed routes
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
My Time at Sandrock
Some gathering randomness, quickly mapped
The Legend of Zelda: Phantom Hourglass
Sea exploration unknowns first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
My Time at Sandrock
Workshop production chains, scheduling and commissions are the game
The Legend of Zelda: Phantom Hourglass
Temple of the Ocean King rewards optimized repeat routing
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.