head to head
Grounded 2 asks more than Red Dead Redemption 2, and the gap is optimization.

Optimization · Practiced Mastery
Backyard survival testing crafting optimisation with timing-based bug combat.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Grounded 2 leans Optimization (Practiced Mastery); Red Dead Redemption 2 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.
Grounded 2
Dodging and perfect-blocking giant bugs takes real timing
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.
Grounded 2
Insect AI follows mappable behaviour patterns
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Grounded 2 leans a little harder on variance, though the gap is small.
Grounded 2
World discovery and resource spawns hide some information
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Grounded 2 leans clearly harder on optimization.
Grounded 2
Base building, armor builds and tech routing drive progress
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.