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 · Pure Mechanics
The bigger, faster sequel doubling down on chaotic crash physics and stunt minigames.

Execution · Twitch Chaos
A kart racer with random items and drift timing across themed tracks.
FlatOut 2 leans Execution (Pure Mechanics); Muppet RaceMania leans Execution (Twitch Chaos).
FlatOut 2 leans a little harder on execution, though the gap is small.
FlatOut 2
High-speed control amid wrecks and ragdolls
Muppet RaceMania
Steering, drifting and item timing decide races
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FlatOut 2
No adaptive opposition worth modeling
Muppet RaceMania
AI racers scripted, no real adaptive prediction
Muppet RaceMania leans a little harder on variance, though the gap is small.
FlatOut 2
Crash physics and track debris vary every race
Muppet RaceMania
Random item pickups swing positions
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FlatOut 2
Track knowledge and car tuning settle into routine
Muppet RaceMania
Shortcuts and item use reward 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.