head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Practiced Mastery
A retro-styled action platformer with pogo-stick combat.

Execution · Practiced Mastery
An open-zone Sonic experiment with cyberspace stages.
Shovel Knight leans Execution (Practiced Mastery); Sonic Frontiers leans Execution (Practiced Mastery).
Shovel Knight leans a little harder on execution, though the gap is small.
Shovel Knight
Pogo combat and platforming need timing
Sonic Frontiers
Boost-running and combat at speed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Shovel Knight
Scripted boss patterns, not reads
Sonic Frontiers
Scripted enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Shovel Knight
Deterministic stages
Sonic Frontiers
Static open zones
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Shovel Knight
Relic and upgrade choices shape runs
Sonic Frontiers
Skill tree and stat farming
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.