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

Execution · Pure Mechanics
A demanding souls-like won by perfect-guard timing and weapon assembly.

Execution · Practiced Mastery
A rhythm-parry action game about reading scripted tells with frame-tight timing.
Lies of P leans Execution (Pure Mechanics); Sekiro: Shadows Die Twice 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.
Lies of P
Perfect-guard timing window punishes errors
Sekiro: Shadows Die Twice
Frame-perfect parries are the entire combat system.
Sekiro: Shadows Die Twice leans a little harder on reads, though the gap is small.
Lies of P
Scripted bosses, no adaptation
Sekiro: Shadows Die Twice
Mikiri and perilous tells are scripted, not adaptive.
Lies of P leans a little harder on variance, though the gap is small.
Lies of P
Minor weapon assembly variance
Sekiro: Shadows Die Twice
Almost no randomness; encounters are deterministic.
Sekiro: Shadows Die Twice leans a little harder on optimization, though the gap is small.
Lies of P
Weapon assembly and P-organ builds reward planning
Sekiro: Shadows Die Twice
Boss decks and prosthetic choices are fully learnable.
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.