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

Execution · Practiced Mastery
The fastest mainline Souls, distilling the formula into aggressive boss duels.

Execution · Practiced Mastery
An open-world soulslike about pattern-learning bosses while engineering a strong build.
Dark Souls III leans Execution (Practiced Mastery); Elden Ring 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.
Dark Souls III
fast roll timing against aggressive scripted bosses
Elden Ring
Dodge timing and weapon spacing carry every fight.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls III
PvP invasions exist but are optional
Elden Ring
Bosses use scripted movesets with delayed timings, not adaptation.
Elden Ring leans a little harder on variance, though the gap is small.
Dark Souls III
fixed encounters converge after first sight
Elden Ring
Open-world drops and rune farms add mild randomness.
Elden Ring leans a little harder on optimization, though the gap is small.
Dark Souls III
movesets and builds are fully mappable
Elden Ring
Build crafting, routes, and boss patterns are deeply 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.