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
Classic action execution through fixed levels and scripted boss patterns.
Sonic Runners leans Execution (Pure Mechanics); Spider-Man 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
Spider-Man
Swinging, combat and timed escapes need real dexterity
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
Spider-Man
Villains repeat fixed boss patterns
Sonic Runners leans a little harder on variance, though the gap is small.
Sonic Runners
occasional random item drops and obstacle layout
Spider-Man
Level events are scripted and quickly known
Spider-Man leans a little harder on optimization, though the gap is small.
Sonic Runners
route/lane and upgrade optimization for score
Spider-Man
Boss patterns and level routes are fully learnable
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.