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.

Execution · Practiced Mastery
A stylish pixel-art action-adventure with silent storytelling.

Execution · Practiced Mastery
Weighty corridor shooting through scripted encounters with light loadout choice.
Hyper Light Drifter leans Execution (Practiced Mastery); Killzone leans Execution (Practiced Mastery).
Hyper Light Drifter leans a little harder on execution, though the gap is small.
Hyper Light Drifter
Quick dash-slash combat with tight windows
Killzone
Heavy gunplay still rewards aim and positioning
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hyper Light Drifter
Scripted bosses with patterns
Killzone
Campaign Helghast follow scripts; servers are long dead
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hyper Light Drifter
Deterministic encounters
Killzone
Encounters are fixed and replayable
Hyper Light Drifter leans a little harder on optimization, though the gap is small.
Hyper Light Drifter
Module loadouts and routing
Killzone
Character choice and route knowledge solve each level
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.