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 dual-protagonist western shooter testing aim and learned stealth routes through scripted levels.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Call of Juarez leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Call of Juarez leans a little harder on execution, though the gap is small.
Call of Juarez
Gunplay and whip platforming need steady aim and timing
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.
Call of Juarez
Campaign enemies are scripted; multiplayer is an afterthought
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.
Call of Juarez
Stealth patrols are unknown first time through, then fixed
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Juarez
Learning each chapter's intended approach for both characters
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.