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

Execution · Practiced Mastery
A serious F1 simulation testing precise car control and setup optimization.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Grand Prix 4 leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Grand Prix 4 leans clearly harder on execution.
Grand Prix 4
Precise braking, throttle and racing-line control define lap times
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Grand Prix 4 leans a little harder on reads, though the gap is small.
Grand Prix 4
AI drivers follow scripted lines, not adapting to you
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.
Grand Prix 4
Weather and grip add some unpredictability per race
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Grand Prix 4 leans clearly harder on optimization.
Grand Prix 4
Setup tuning and optimal lines are a deep solvable layer
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.