head to head
Darksiders III asks more than Red Dead Redemption 2, and the gap is execution.

Execution · Practiced Mastery
Souls-flavored action-adventure where Fury whips through the Seven Deadly Sins on a ruined Earth.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Darksiders III leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Darksiders III leans clearly harder on execution.
Darksiders III
Souls-style dodge timing with punishing windows carries fights
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Darksiders III
Sin bosses are pattern sets, not adaptive minds
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Red Dead Redemption 2 leans a little harder on variance, though the gap is small.
Darksiders III
Hidden upgrades matter once; world is fixed
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Darksiders III leans clearly harder on optimization.
Darksiders III
Hollow swapping, upgrade routing, and moveset study pay off
Red Dead Redemption 2
Loadouts and routes solvable but loose.
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.