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 top-down co-op shooter testing aim against waves of mutants.

Execution · Practiced Mastery
A narrative third-person shooter that turns a Dubai rescue mission into a study of war's moral cost.
Dead Horde leans Execution (Practiced Mastery); Spec Ops: The Line leans Execution (Practiced Mastery).
Dead Horde leans a little harder on execution, though the gap is small.
Dead Horde
Top-down aiming against mutant swarms is core
Spec Ops: The Line
Competent cover shooting is all the game demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Horde
Enemies are scripted hordes, nothing adapts
Spec Ops: The Line
Enemy squads follow fixed scripted assaults
Dead Horde leans a little harder on variance, though the gap is small.
Dead Horde
Spawn directions add some unpredictability
Spec Ops: The Line
Set-piece encounters play out the same each run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Horde
Weapon choice and positioning plan survival
Spec Ops: The Line
Cover routes and loadout choices are quickly solved
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.