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

Execution · Pure Mechanics
Keeping speed through destruction-racing chaos that punishes clean-lap plans.

Execution · Practiced Mastery
An open-world arcade racer across Australia where car control and tuning carry every event.
FlatOut: Ultimate Carnage leans Execution (Pure Mechanics); Forza Horizon 3 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
FlatOut: Ultimate Carnage
Holding racing lines through wrecks and ragdoll chaos tests hands
Forza Horizon 3
Car control and racing lines at speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FlatOut: Ultimate Carnage
Rival drivers ram predictably, light multiplayer jockeying
Forza Horizon 3
Drivatars mimic but don't truly adapt
FlatOut: Ultimate Carnage leans a little harder on variance, though the gap is small.
FlatOut: Ultimate Carnage
Debris and pileups scramble any planned lap
Forza Horizon 3
Minor traffic and event variation
Forza Horizon 3 leans a little harder on optimization, though the gap is small.
FlatOut: Ultimate Carnage
Car upgrades and track shortcuts are mappable
Forza Horizon 3
Tuning, car choice, and route 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.