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
An explosively destructible run-and-gun starring parody action-movie heroes.
Arkanoid DS leans Execution (Pure Mechanics); Broforce 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
Broforce
Run-and-gun reflexes amid constant explosions
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Arkanoid DS
Solo block-breaker, no opponent to model
Broforce
Enemies are dumb scripts
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
Broforce
Random bro assignments and destructible chaos shake runs
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
Broforce
Knowing each bro's kit and level layouts helps
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.