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
Top-down aim and kiting against scripted alien swarms with light upgrade planning.
Red Dead Redemption 2 leans Execution (Practiced Mastery); Shadowgrounds leans Execution (Practiced Mastery).
Shadowgrounds leans a little harder on execution, though the gap is small.
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Shadowgrounds
Kiting alien swarms top-down rewards steady aim and movement
Red Dead Redemption 2 leans a little harder on reads, though the gap is small.
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Shadowgrounds
Aliens charge on simple scripts, never modelling you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Shadowgrounds
Ambush triggers are scripted-but-unknown on first playthrough
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption 2
Loadouts and routes solvable but loose.
Shadowgrounds
Weapon upgrade routing is a light solvable layer
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.