head to head
Warhammer: Vermintide 2 asks more than S.T.A.L.K.E.R.: Shadow of Chernobyl, and the gap is execution.

Optimization · Practiced Mastery
An atmospheric open-zone survival shooter set in the Chernobyl exclusion zone.

Execution · Practiced Mastery
Co-op melee horde shooter with deep builds.
S.T.A.L.K.E.R.: Shadow of Chernobyl leans Optimization (Practiced Mastery); Warhammer: Vermintide 2 leans Execution (Practiced Mastery).
Warhammer: Vermintide 2 leans clearly harder on execution.
S.T.A.L.K.E.R.: Shadow of Chernobyl
Ballistic gunplay punishes sloppy aim
Warhammer: Vermintide 2
Melee timing, dodges, headshots demanding
Warhammer: Vermintide 2 leans a little harder on reads, though the gap is small.
S.T.A.L.K.E.R.: Shadow of Chernobyl
A-Life feels alive but doesn't model you
Warhammer: Vermintide 2
Specials are scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
S.T.A.L.K.E.R.: Shadow of Chernobyl
Anomalies, mutant spawns, and artifact RNG hide information
Warhammer: Vermintide 2
Director spawns and loot randomize runs
Warhammer: Vermintide 2 leans a little harder on optimization, though the gap is small.
S.T.A.L.K.E.R.: Shadow of Chernobyl
Artifact economy, routes, and stash knowledge converge
Warhammer: Vermintide 2
Builds, talents, weapon breakpoints 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.