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
Fast aim-and-movement arenas layered over roguelike perk-stacking decisions.

Execution · Twitch Chaos
An open-world survival shooter set in a hostile irradiated Zone full of anomalies and scarce supplies.
Crab Champions leans Execution (Practiced Mastery); S.T.A.L.K.E.R. 2: Heart of Chornobyl leans Execution (Twitch Chaos).
Crab Champions leans a little harder on execution, though the gap is small.
Crab Champions
Aimbot plus perfect movement trivialises the fast arena gunplay
S.T.A.L.K.E.R. 2: Heart of Chornobyl
Lethal gunfights with recoil, bleed, and ballistics punish sloppy aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crab Champions
Enemies swarm on fixed behaviours, never modelling you
S.T.A.L.K.E.R. 2: Heart of Chornobyl
A-Life NPCs roam but never model the player adaptively
S.T.A.L.K.E.R. 2: Heart of Chornobyl leans a little harder on variance, though the gap is small.
Crab Champions
Random loot and perk offerings shape every run's power curve
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.
Crab Champions
Stacking synergistic perk builds is the run-winning layer
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.