head to head
Guitar Hero: World Tour asks more than Space Channel 5: Part 2, and the gap is execution.

Execution · Pure Mechanics
The Guitar Hero entry that added drums and vocals to chase full-band play.

Execution · Practiced Mastery
A stylish call-and-response rhythm adventure where reporter Ulala dances to save the galaxy.
Guitar Hero: World Tour leans Execution (Pure Mechanics); Space Channel 5: Part 2 leans Execution (Practiced Mastery).
Guitar Hero: World Tour leans clearly harder on execution.
Guitar Hero: World Tour
Fret-and-strum accuracy on expert note charts
Space Channel 5: Part 2
Precise timing on call-and-response button sequences
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Guitar Hero: World Tour
Charts never adapt
Space Channel 5: Part 2
Sequences are scripted
Space Channel 5: Part 2 leans a little harder on variance, though the gap is small.
Guitar Hero: World Tour
Deterministic charts
Space Channel 5: Part 2
First playthrough hides upcoming commands
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Guitar Hero: World Tour
Star power activation paths drive top scores
Space Channel 5: Part 2
Memorizing every routine for perfect runs
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.