head to head
FlatOut: Ultimate Carnage asks more than DOOM (2016), and the gap is variance.

Execution · Pure Mechanics
Push-forward arena FPS where movement and aim are the whole game.

Execution · Pure Mechanics
Keeping speed through destruction-racing chaos that punishes clean-lap plans.
DOOM (2016) leans Execution (Pure Mechanics); FlatOut: Ultimate Carnage leans Execution (Pure Mechanics).
DOOM (2016) leans a little harder on execution, though the gap is small.
DOOM (2016)
Aim, movement, glory-kill timing all peak.
FlatOut: Ultimate Carnage
Holding racing lines through wrecks and ragdoll chaos tests hands
FlatOut: Ultimate Carnage leans a little harder on reads, though the gap is small.
DOOM (2016)
Demons scripted attack patterns.
FlatOut: Ultimate Carnage
Rival drivers ram predictably, light multiplayer jockeying
FlatOut: Ultimate Carnage leans clearly harder on variance.
DOOM (2016)
Minimal encounter randomness.
FlatOut: Ultimate Carnage
Debris and pileups scramble any planned lap
DOOM (2016) leans a little harder on optimization, though the gap is small.
DOOM (2016)
Rune and weapon mod picks meaningful.
FlatOut: Ultimate Carnage
Car upgrades and track shortcuts are mappable
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.