head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.

Execution · Practiced Mastery
A cinematic desert-bound adventure of shootouts, brawls, and sinking-ship set pieces.
Red Dead Redemption 2 leans Execution (Practiced Mastery); Uncharted 3: Drake's Deception 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.
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Uncharted 3: Drake's Deception
Gunfights, melee, and chases need steady hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Uncharted 3: Drake's Deception
Scripted enemies; multiplayer adds a trace
Red Dead Redemption 2 leans a little harder on variance, though the gap is small.
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Uncharted 3: Drake's Deception
Linear authored adventure
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Red Dead Redemption 2
Loadouts and routes solvable but loose.
Uncharted 3: Drake's Deception
Learning encounters and routes solves the campaign
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.