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 · Pure Mechanics
The bigger, faster sequel doubling down on chaotic crash physics and stunt minigames.
Carmageddon: Max Damage leans Execution (Practiced Mastery); FlatOut 2 leans Execution (Pure Mechanics).
FlatOut 2 leans a little harder on execution, though the gap is small.
Carmageddon: Max Damage
Vehicular mayhem rewards precise ramming and recovery driving
FlatOut 2
High-speed control amid wrecks and ragdolls
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
FlatOut 2
No adaptive opposition worth modeling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Carmageddon: Max Damage
Physics chaos and pickup spawns scramble outcomes
FlatOut 2
Crash physics and track debris vary every race
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
FlatOut 2
Track knowledge and car tuning settle into routine
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.