head to head
Orcs Must Die! Unchained asks more than Red Dead Redemption 2, and the gap is reads.

Optimization · Practiced Mastery
Trap-maze economics against human attackers who adapt their pushes.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Orcs Must Die! Unchained leans Optimization (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Orcs Must Die! Unchained
Third-person combat matters but traps do the killing
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Orcs Must Die! Unchained leans clearly harder on reads.
Orcs Must Die! Unchained
PvP sieges reward predicting enemy pushes and trap placement
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.
Orcs Must Die! Unchained
Card draws and minion waves add mild noise
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Orcs Must Die! Unchained leans clearly harder on optimization.
Orcs Must Die! Unchained
Trap economy and maze layout theory decide fortresses
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.