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
Co-op-focused action sequel hurling Titus against Tyranid swarms with parry-heavy melee combat.

Execution · Practiced Mastery
Timing-based wuxia combat layered over build optimisation in an open world.
Warhammer 40,000: Space Marine 2 leans Execution (Practiced Mastery); Where Winds Meet leans Execution (Practiced Mastery).
Warhammer 40,000: Space Marine 2 leans a little harder on execution, though the gap is small.
Warhammer 40,000: Space Marine 2
Parry, dodge and gun-strike timing against swarms
Where Winds Meet
Parry and dodge timing in martial-arts duels rewards hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Warhammer 40,000: Space Marine 2
PvP Eternal War adds some human prediction
Where Winds Meet
PvP modes add some human prediction, mostly PvE scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Warhammer 40,000: Space Marine 2
Tyranid swarm spawns vary run to run
Where Winds Meet
Open-world events and drops add mild randomness
Where Winds Meet leans a little harder on optimization, though the gap is small.
Warhammer 40,000: Space Marine 2
Class builds and perk loadouts reward planning
Where Winds Meet
Build crafting and boss moveset learning drive progression
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.