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
An auto-runner spinoff of Sonic testing quick reflexes and route memorization.

Execution · Practiced Mastery
Mid-demand 3D platforming execution across fixed gravity puzzles.
Sonic Runners leans Execution (Pure Mechanics); Super Mario Galaxy leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic Runners
timing jumps/dashes at speed rewards precise inputs
Super Mario Galaxy
Gravity-bending jumps need timing, though forgiving by Mario standards
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Sonic Runners
no opponent to out-predict, pure solo runner
Super Mario Galaxy
Bosses repeat fixed patterns - nothing adapts
Sonic Runners leans a little harder on variance, though the gap is small.
Sonic Runners
occasional random item drops and obstacle layout
Super Mario Galaxy
Galaxies are scripted; surprises evaporate after one visit
Super Mario Galaxy leans a little harder on optimization, though the gap is small.
Sonic Runners
route/lane and upgrade optimization for score
Super Mario Galaxy
Star routes and comet challenges reward learned solutions
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.