head to head
Tom Clancy's Rainbow Six asks more than Red Dead Redemption 2, and the gap is optimization.

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

Optimization · Practiced Mastery
Planning a raid in advance, then executing it where one mistake kills.
Red Dead Redemption 2 leans Execution (Practiced Mastery); Tom Clancy's Rainbow Six leans Optimization (Practiced Mastery).
Tom Clancy's Rainbow Six leans a little harder on execution, though the gap is small.
Red Dead Redemption 2
Gunplay and Dead Eye reward aim and timing.
Tom Clancy's Rainbow Six
One bullet kills, so entries demand clean aim
Tom Clancy's Rainbow Six leans clearly harder on reads.
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Tom Clancy's Rainbow Six
Multiplayer raids add human counterplay
Tom Clancy's Rainbow Six leans a little harder on variance, though the gap is small.
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Tom Clancy's Rainbow Six
Terrorist placements are unknown until doors open
Tom Clancy's Rainbow Six leans clearly harder on optimization.
Red Dead Redemption 2
Loadouts and routes solvable but loose.
Tom Clancy's Rainbow Six
The pre-mission planning phase is the real game
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.