head to head
Returnal asks more than S.T.A.L.K.E.R. 2: Heart of Chornobyl, and the gap is execution.

Execution · Twitch Chaos
Bullet-hell roguelike third-person shooter.

Execution · Twitch Chaos
An open-world survival shooter set in a hostile irradiated Zone full of anomalies and scarce supplies.
Returnal leans Execution (Twitch Chaos); S.T.A.L.K.E.R. 2: Heart of Chornobyl leans Execution (Twitch Chaos).
Returnal leans clearly harder on execution.
Returnal
Bullet-hell dodge and aim under pressure
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Lethal gunfights with recoil, bleed, and ballistics punish sloppy aim
Returnal leans a little harder on reads, though the gap is small.
Returnal
Bosses scripted, patterns not adaptive
S.T.A.L.K.E.R. 2: Heart of Chornobyl
A-Life NPCs roam but never model the player adaptively
Returnal leans a little harder on variance, though the gap is small.
Returnal
Room layouts, parasites, items roguelike
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Anomalies, emissions, stash rolls, and unknown Zone layouts hide information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Returnal
Build synergies and route planning
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Artifact hunting, gear upkeep economy, and routing through the Zone
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.