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
Retro run-and-gun reflexes over memorised level layouts and item routes.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Rambo III leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Rambo III leans a little harder on execution, though the gap is small.
Rambo III
Shooting and dodging through enemy soldiers leads the test
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.
Rambo III
Guards follow simple fixed routines
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.
Rambo III
Level layouts are static once seen
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.
Rambo III
Learning item locations and routes solves each mission
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.