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 · Pure Mechanics
Combo execution and dodge timing through scripted grindhouse brawls.

Execution · Practiced Mastery
Classic action execution through fixed levels and scripted boss patterns.
Shank leans Execution (Pure Mechanics); Spider-Man leans Execution (Practiced Mastery).
Shank leans a little harder on execution, though the gap is small.
Shank
Combo juggling and dodge timing carry every brawl
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.
Shank
Enemies and bosses attack on fixed patterns
Spider-Man
Villains repeat fixed boss patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Shank
Hand-built levels with no randomness
Spider-Man
Level events are scripted and quickly known
Spider-Man leans a little harder on optimization, though the gap is small.
Shank
Weapon-swap combo routing rewards some lab work
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.