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
A modern beat-em-up where precise combo execution and enemy-pattern mastery are the skill ceiling.
FlatOut: Ultimate Carnage leans Execution (Pure Mechanics); Streets of Rage 4 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
Streets of Rage 4
Precise combo strings, parry timing, and star-move usage are decisive
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
Streets of Rage 4
Enemies use scripted attack patterns; no adaptive opponent
FlatOut: Ultimate Carnage leans a little harder on variance, though the gap is small.
FlatOut: Ultimate Carnage
Debris and pileups scramble any planned lap
Streets of Rage 4
Enemy arrangement is largely fixed; minimal RNG
Streets of Rage 4 leans a little harder on optimization, though the gap is small.
FlatOut: Ultimate Carnage
Car upgrades and track shortcuts are mappable
Streets of Rage 4
Character selection, route sequencing, and score management reward study
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.