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

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

Execution · Pure Mechanics
Mastering the double-barrel shotgun's rhythm while navigating scripted enemy ambushes across dense urban maps.
Arkanoid DS leans Execution (Pure Mechanics); Doom II: Hell on Earth 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.
Arkanoid DS
Precise paddle control to keep the ball alive
Doom II: Hell on Earth
Super Shotgun and movement timing demand precise motor execution
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
Doom II: Hell on Earth
All enemies are scripted; no opponent models the player
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
Doom II: Hell on Earth
Ambush placements are hidden until triggered on first run
Doom II: Hell on Earth leans a little harder on optimization, though the gap is small.
Arkanoid DS
Brick-clearing order and angles reward planning
Doom II: Hell on Earth
Learning enemy placement and resource routes reduces every encounter
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.