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 · Pure Mechanics
A block-breaker testing paddle precision and reaction against accelerating ball physics.

Execution · Pure Mechanics
The bigger, faster sequel doubling down on chaotic crash physics and stunt minigames.
Arkanoid DS leans Execution (Pure Mechanics); FlatOut 2 leans Execution (Pure Mechanics).
Arkanoid DS leans a little harder on execution, though the gap is small.
Arkanoid DS
Precise paddle control to keep the ball alive
FlatOut 2
High-speed control amid wrecks and ragdolls
FlatOut 2 leans a little harder on reads, though the gap is small.
Arkanoid DS
Solo block-breaker, no opponent to model
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.
Arkanoid DS
Power-up drops are randomized each play
FlatOut 2
Crash physics and track debris vary every race
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arkanoid DS
Brick-clearing order and angles reward planning
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.