head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
Patient combinatorial planning to engineer rare tile formations against drop randomness.

Optimization · Pure Optimization
Touch-controlled DS Zelda centered on re-running a timed stealth dungeon ever faster.
Hexic HD leans Optimization (Pure Optimization); The Legend of Zelda: Phantom Hourglass leans Optimization (Pure Optimization).
The Legend of Zelda: Phantom Hourglass leans a little harder on execution, though the gap is small.
Hexic HD
Unhurried rotations - minimal dexterity needed
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.
Hexic HD
Solo board with no adversary
The Legend of Zelda: Phantom Hourglass
Phantoms patrol fixed routes
Hexic HD leans a little harder on variance, though the gap is small.
Hexic HD
New tile colors drop semi-randomly into plans
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.
Hexic HD
Engineering starflowers and black pearls is deep planning
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.