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 · Pure Mechanics
A twin-stick arena blaster testing sustained dodging reflexes and upgrade picks.
FlatOut 2 leans Execution (Pure Mechanics); Ultratron leans Execution (Pure Mechanics).
Ultratron leans a little harder on execution, though the gap is small.
FlatOut 2
High-speed control amid wrecks and ragdolls
Ultratron
Twin-stick dodging through bullet swarms is the entire test
FlatOut 2 leans a little harder on reads, though the gap is small.
FlatOut 2
No adaptive opposition worth modeling
Ultratron
Robots swarm in fixed behaviours, nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FlatOut 2
Crash physics and track debris vary every race
Ultratron
Enemy spawns and power-up drops shuffle each level
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
Ultratron
Upgrade pet-and-perk choices shape survivability
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.