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
Vehicular mayhem testing car handling plus knowing when wrecking beats racing.

Execution · Practiced Mastery
A kart-style racer about drifting and using items on family-friendly tracks.
Carmageddon II: Carpocalypse Now leans Execution (Practiced Mastery); Cars 3: Driven to Win leans Execution (Practiced Mastery).
Carmageddon II: Carpocalypse Now leans a little harder on execution, though the gap is small.
Carmageddon II: Carpocalypse Now
Perfect car control trivialises wrecking AI opponents and surviving
Cars 3: Driven to Win
drifting and item-timing control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Carmageddon II: Carpocalypse Now
AI drivers follow set behaviours, never modelling the player
Cars 3: Driven to Win
minimal, mostly AI opponents
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Carmageddon II: Carpocalypse Now
Pickup spawns and physics chaos add modest run-to-run noise
Cars 3: Driven to Win
item pickups and track hazard randomness
Carmageddon II: Carpocalypse Now leans a little harder on optimization, though the gap is small.
Carmageddon II: Carpocalypse Now
Choosing wreck-versus-race strategy and upgrade economy is solvable
Cars 3: Driven to Win
vehicle upgrades and track knowledge
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.