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.

Optimization · Practiced Mastery
Time-looping sequel that doubles down on the swarm-shooting and weapon-farming loop.

Execution · Practiced Mastery
Landmark scripted FPS following Gordon Freeman through the Black Mesa disaster.
Earth Defense Force 6 leans Optimization (Practiced Mastery); Half-Life leans Execution (Practiced Mastery).
Half-Life leans a little harder on execution, though the gap is small.
Earth Defense Force 6
Swarm kiting and aim across four classes
Half-Life
Combat aim and infamous platforming sections
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Earth Defense Force 6
Enemies remain scripted swarm AI
Half-Life
Marines flank by script, not by modelling you
Earth Defense Force 6 leans a little harder on variance, though the gap is small.
Earth Defense Force 6
RNG weapon drops and armor farming
Half-Life
Set pieces surprise only on first run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Earth Defense Force 6
Loadout theory and mission-specific strategies
Half-Life
Resource routing and encounter knowledge for speedruns
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.