head to head
Dead Rising 3 asks more than Red Dead Redemption 2, and the gap is optimization.

Optimization · Practiced Mastery
Crafting absurd weapons and routing a zombie-filled city against the clock.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Dead Rising 3 leans Optimization (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Red Dead Redemption 2 leans a little harder on execution, though the gap is small.
Dead Rising 3
Crowd fighting takes modest aim and dodge timing
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Red Dead Redemption 2 leans a little harder on reads, though the gap is small.
Dead Rising 3
Zombies and psychopaths run fixed scripts, never adapt
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Rising 3
Weapon and blueprint locations are unknown until explored
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Dead Rising 3 leans clearly harder on optimization.
Dead Rising 3
Combo weapon crafting and timed routing drive efficient runs
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.