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

Optimization · Practiced Mastery
Planning squad approaches to scripted missions where one mistake kills.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Hidden & Dangerous 2 leans Optimization (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Hidden & Dangerous 2 leans a little harder on execution, though the gap is small.
Hidden & Dangerous 2
Deliberate aim and stealth movement punish sloppy hands
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hidden & Dangerous 2
German AI follows patrol scripts, not adapting to you
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Hidden & Dangerous 2 leans a little harder on variance, though the gap is small.
Hidden & Dangerous 2
Patrol routes and enemy positions are unknown first attempt
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Hidden & Dangerous 2 leans clearly harder on optimization.
Hidden & Dangerous 2
Squad planning, loadouts and approach routing decide missions
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.