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

Execution · Pure Mechanics
DS rhythm game where cheerleading agents demand pixel-perfect stylus taps on the beat.

Execution · Pure Mechanics
Sequel rhythm game with harder setlists and refined plastic-guitar technique.
Elite Beat Agents leans Execution (Pure Mechanics); Guitar Hero II 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.
Elite Beat Agents
Stylus precision and rhythm timing are everything
Guitar Hero II
Harder charts, hammer-ons, and three-note chords
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Elite Beat Agents
No opponent
Guitar Hero II
Static note highways
Elite Beat Agents leans a little harder on variance, though the gap is small.
Elite Beat Agents
Charts are fully visible and fixed
Guitar Hero II
Fully deterministic charts
Elite Beat Agents leans a little harder on optimization, though the gap is small.
Elite Beat Agents
Memorising spinner and beat layouts
Guitar Hero II
Star power pathing for leaderboard play
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.