head to head
Left 4 Dead 2 asks more than Deep Rock Galactic, and the gap is reads.

Execution · Practiced Mastery
A co-op mining shooter where reading randomised caves and optimising class roles carry teams through escalating bug hordes.

Execution · Practiced Mastery
Co-op zombie shooter with adaptive AI Director.
Deep Rock Galactic leans Execution (Practiced Mastery); Left 4 Dead 2 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.
Deep Rock Galactic
Accurate shooting and mobility across 3D cave terrain is demanding
Left 4 Dead 2
Headshots under horde pressure need aim
Left 4 Dead 2 leans clearly harder on reads.
Deep Rock Galactic
Glyphids follow scripted swarm patterns, not adaptive behaviour
Left 4 Dead 2
Versus special-infected ambushes have reads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Deep Rock Galactic
Cave layouts, bug types, and secondary objectives randomise each mission
Left 4 Dead 2
AI Director randomizes spawns and items
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Deep Rock Galactic
Class builds, resource routing, and objective sequencing reward mastery
Left 4 Dead 2
Route knowledge and weapon picks solvable
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.