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 · Practiced Mastery
Kiting scripted alien swarms with top-down aim and upgrade planning.

Execution · Practiced Mastery
One-thumb tap-timing precision over fixed courses with solvable coin routes.
Shadowgrounds Survivor leans Execution (Practiced Mastery); Super Mario Run 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.
Shadowgrounds Survivor
Kiting alien swarms with top-down aim is the core demand
Super Mario Run
One-handed tap timing for coin lines demands precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Shadowgrounds Survivor
Aliens charge on simple scripted aggression
Super Mario Run
Auto-runner with no adaptive opponent; Toad Rally is asynchronous
Shadowgrounds Survivor leans a little harder on variance, though the gap is small.
Shadowgrounds Survivor
Spawn waves vary slightly in survival mode
Super Mario Run
Courses are fixed and fully learnable
Shadowgrounds Survivor leans a little harder on optimization, though the gap is small.
Shadowgrounds Survivor
Weapon upgrade order and positioning reward planning
Super Mario Run
Routing perfect coin runs is a solvable layout puzzle
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.