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 · Practiced Mastery
A twin-stick shooter testing aim and crowd control against zombie hordes.

Execution · Pure Mechanics
The bigger, faster sequel doubling down on chaotic crash physics and stunt minigames.
All Zombies Must Die! leans Execution (Practiced Mastery); FlatOut 2 leans Execution (Pure Mechanics).
FlatOut 2 leans a little harder on execution, though the gap is small.
All Zombies Must Die!
Twin-stick aiming and dodging hordes is the core skill
FlatOut 2
High-speed control amid wrecks and ragdolls
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
All Zombies Must Die!
Zombies swarm on fixed AI, nothing to out-predict
FlatOut 2
No adaptive opposition worth modeling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
All Zombies Must Die!
Drops and modifiers add some randomness
FlatOut 2
Crash physics and track debris vary every race
All Zombies Must Die! leans a little harder on optimization, though the gap is small.
All Zombies Must Die!
Crafting weapons and quest routing builds power over time
FlatOut 2
Track knowledge and car tuning settle into routine
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.