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
Finger speed and accuracy against fixed note charts of 80s tracks.

Execution · Pure Mechanics
Brutal rhythm-violence game where perfect timing on a screaming track is all that exists.
Guitar Hero Encore: Rocks the 80s leans Execution (Pure Mechanics); Thumper 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.
Guitar Hero Encore: Rocks the 80s
Hitting note charts at speed is a pure motor ceiling
Thumper
Split-second rhythm inputs at speed are the entire test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Guitar Hero Encore: Rocks the 80s
No opponent, just the chart
Thumper
No opponent, only the track
Thumper leans a little harder on variance, though the gap is small.
Guitar Hero Encore: Rocks the 80s
Charts are fixed and fully memorisable
Thumper
Tracks are fixed and learnable
Thumper leans a little harder on optimization, though the gap is small.
Guitar Hero Encore: Rocks the 80s
Star power pathing squeezes out extra score
Thumper
Memorizing patterns and scoring lines helps mastery
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.