head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
An action RPG where precise SAS-power combos and environmental psychokinetics carry fights against memorisable enemy patterns.

Execution · Practiced Mastery
Co-op-focused action sequel hurling Titus against Tyranid swarms with parry-heavy melee combat.
Scarlet Nexus leans Execution (Practiced Mastery); Warhammer 40,000: Space Marine 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.
Scarlet Nexus
SAS swap combos and PSY-resistance windows demand execution precision
Warhammer 40,000: Space Marine 2
Parry, dodge and gun-strike timing against swarms
Warhammer 40,000: Space Marine 2 leans a little harder on reads, though the gap is small.
Scarlet Nexus
All Others are fully scripted; no adaptive opponent
Warhammer 40,000: Space Marine 2
PvP Eternal War adds some human prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Scarlet Nexus
Random item drops for brain map currency are minor
Warhammer 40,000: Space Marine 2
Tyranid swarm spawns vary run to run
Scarlet Nexus leans a little harder on optimization, though the gap is small.
Scarlet Nexus
SAS bond stacking, brain map routing, and pin combos reward forward planning
Warhammer 40,000: Space Marine 2
Class builds and perk loadouts reward planning
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.