head to head
Gran Turismo 4 asks more than Red Dead Redemption 2, and the gap is execution.

Execution · Practiced Mastery
An encyclopedic driving simulator spanning 700 cars and decades of automotive history.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Gran Turismo 4 leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Gran Turismo 4 leans clearly harder on execution.
Gran Turismo 4
Hundreds of cars all demand precise inputs
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.
Gran Turismo 4
Fixed-line AI offers no adaptive opposition
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.
Gran Turismo 4
Deterministic outside slight tyre wear modelling
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Gran Turismo 4 leans clearly harder on optimization.
Gran Turismo 4
Event-by-event car and tune selection is deeply solvable
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.