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

Execution · Pure Mechanics
A top-down zombie shooter testing aim and survival against waves in the dark.

Execution · Pure Mechanics
Open-world racer where banking risky speedpoints against human cops drives the tension.
Blackout Z: Slaughterhouse Edition leans Execution (Pure Mechanics); Need for Speed: Rivals leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Blackout Z: Slaughterhouse Edition
Twin-stick aim and movement under a draining flashlight
Need for Speed: Rivals
Open-road control with pursuit tech timing
Need for Speed: Rivals leans a little harder on reads, though the gap is small.
Blackout Z: Slaughterhouse Edition
Zombies swarm on scripts, no prediction
Need for Speed: Rivals
AllDrive mixes human cops and racers in
Blackout Z: Slaughterhouse Edition leans a little harder on variance, though the gap is small.
Blackout Z: Slaughterhouse Edition
Spawn waves and pickups vary each run
Need for Speed: Rivals
Dynamic open-world encounters and weather
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Blackout Z: Slaughterhouse Edition
Battery and ammo management reward efficient play
Need for Speed: Rivals
Risk-versus-bank speedpoint economy
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.