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

Execution · Pure Mechanics
Course-corrected revision restoring difficulty to the trilogy's weakest entry.

Execution · Practiced Mastery
A character action RPG built on tight parry timing against elaborate scripted bosses.
Ninja Gaiden 3: Razor's Edge leans Execution (Pure Mechanics); Stellar Blade leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Ninja Gaiden 3: Razor's Edge
Steel-on-bone counters still demand sharp hands
Stellar Blade
Parry and perfect-dodge timing windows define the ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ninja Gaiden 3: Razor's Edge
Scripted enemy waves
Stellar Blade
Bosses run fixed movesets, learnable not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ninja Gaiden 3: Razor's Edge
Deterministic encounters
Stellar Blade
Encounters and loot are static and predictable
Stellar Blade leans a little harder on optimization, though the gap is small.
Ninja Gaiden 3: Razor's Edge
Simplified systems leave less to solve
Stellar Blade
Exospine builds, gear and moveset study reward preparation
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.