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
A cinematic open-world western leaning on shooting feel and atmosphere.

Execution · Practiced Mastery
A twin-stick action shooter testing aim and crowd control against scripted hordes.
Red Dead Redemption 2 leans Execution (Practiced Mastery); Warhammer 40,000: Kill Team leans Execution (Practiced Mastery).
Warhammer 40,000: Kill Team leans a little harder on execution, though the gap is small.
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Warhammer 40,000: Kill Team
Twin-stick aiming and dodging waves is the action core
Warhammer 40,000: Kill Team leans a little harder on reads, though the gap is small.
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Warhammer 40,000: Kill Team
Enemy hordes are scripted, not adapting minds
Warhammer 40,000: Kill Team leans a little harder on variance, though the gap is small.
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Warhammer 40,000: Kill Team
Enemy spawns and drops add bounded randomness
Warhammer 40,000: Kill Team leans a little harder on optimization, though the gap is small.
Red Dead Redemption 2
Loadouts and routes solvable but loose.
Warhammer 40,000: Kill Team
Class abilities and upgrade paths 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.