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
Hitting fixed pop-rock note charts - execution speed and accuracy, full stop.

Execution · Pure Mechanics
Sequel rhythm game with harder setlists and refined plastic-guitar technique.
Band Hero leans Execution (Pure Mechanics); Guitar Hero II leans Execution (Pure Mechanics).
Guitar Hero II leans a little harder on execution, though the gap is small.
Band Hero
Hitting scrolling note charts on expert is pure hands
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.
Band Hero
Charts are fixed - nothing to predict
Guitar Hero II
Static note highways
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Band Hero
Identical note charts every play
Guitar Hero II
Fully deterministic charts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Band Hero
Star-power phrasing adds a thin scoring layer
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.