head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Practiced Mastery
Chaotic vehicular destruction testing driving control and map knowledge.

Execution · Practiced Mastery
A cinematic open-world western leaning on shooting feel and atmosphere.
Carmageddon: Max Damage leans Execution (Practiced Mastery); Red Dead Redemption 2 leans Execution (Practiced Mastery).
Carmageddon: Max Damage leans a little harder on execution, though the gap is small.
Carmageddon: Max Damage
Vehicular mayhem rewards precise ramming and recovery driving
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.
Carmageddon: Max Damage
AI rivals follow routines, not your mind
Red Dead Redemption 2
Enemies use scripted AI patterns, not adaptation.
Carmageddon: Max Damage leans a little harder on variance, though the gap is small.
Carmageddon: Max Damage
Physics chaos and pickup spawns scramble outcomes
Red Dead Redemption 2
Some hunting and weather randomness, lightly hidden.
Carmageddon: Max Damage leans a little harder on optimization, though the gap is small.
Carmageddon: Max Damage
Knowing maps, shortcuts and wreck-economy wins events
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.