Building comparison
head to head
Guitar Hero: World TourvsUm Jammer Lammy
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.
Guitar Hero: World Tour
Execution · Pure Mechanics
The Guitar Hero entry that added drums and vocals to chase full-band play.
Um Jammer Lammy
Execution · Pure Mechanics
PaRappa spinoff guitar rhythm game with famously strict and slippery timing judgment.
Guitar Hero: World Tour leans Execution (Pure Mechanics); Um Jammer Lammy leans Execution (Pure Mechanics).
Guitar Hero: World TourUm Jammer Lammy
Axis by axis
Execution8 vs 8
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Guitar Hero: World Tour
Fret-and-strum accuracy on expert note charts
Um Jammer Lammy
Loose timing windows punish imprecise guitar inputs
Reads0 vs 0
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
Um Jammer Lammy
Call-and-response lines are scripted
Variance0 vs 1
Um Jammer Lammy leans a little harder on variance, though the gap is small.
Guitar Hero: World Tour
Deterministic charts
Um Jammer Lammy
Fixed songs, ad-lib scoring slightly opaque
Optimization4 vs 3
Guitar Hero: World Tour leans a little harder on optimization, though the gap is small.
Guitar Hero: World Tour
Star power activation paths drive top scores
Um Jammer Lammy
Freestyle Cool-mode lines can be crafted and learned
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.