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.

Optimization · Systems & Chaos
A children's hidden-object game about spotting items from rhyming riddles.

Optimization · Pure Optimization
A noir Fables investigation where QTE action wraps a scripted mystery with limited genuine deduction.
I Spy Fantasy leans Optimization (Systems & Chaos); The Wolf Among Us leans Optimization (Pure Optimization).
The Wolf Among Us leans a little harder on execution, though the gap is small.
I Spy Fantasy
Clicking found objects, no dexterity
The Wolf Among Us
Action sequences use basic QTE with low penalty for failure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
I Spy Fantasy
No opponent to model
The Wolf Among Us
Fables inhabitants follow scripted roles with no adaptive modelling
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
I Spy Fantasy
Object placement varies but is fixed per scene
The Wolf Among Us
Investigation choices partially obscure which evidence matters
The Wolf Among Us leans a little harder on optimization, though the gap is small.
I Spy Fantasy
Systematic scanning to find riddle objects faster
The Wolf Among Us
Scene order and evidence collection allow minor optimisation of deduction paths
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.