head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
Treasure's Mega Drive boss-rush gauntlet demanding flawless execution against giant setpieces.

Execution · Pure Mechanics
A first-person cyberpunk slasher where everything dies in one hit, including you.
Alien Soldier leans Execution (Pure Mechanics); Ghostrunner leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Soldier
Frame-tight dodges across thirty-plus bosses
Ghostrunner
One-hit-death parkour and slashing demand near-perfect inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Soldier
Bosses fully scripted
Ghostrunner
Enemy placements are fixed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Soldier
Nothing hidden after one loop
Ghostrunner
Deterministic levels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Alien Soldier
Weapon loadout and moveset mastery solvable
Ghostrunner
Route planning and enemy-order solutions define fast clears
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.