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 · Pure Optimization
Linear JRPG built around real-time paradigm switching and stagger combat.

Optimization · Pure Optimization
CD Projekt's first RPG, a dark fantasy of monster contracts and morally gray choices.
Final Fantasy XIII leans Optimization (Pure Optimization); The Witcher leans Optimization (Pure Optimization).
The Witcher leans a little harder on execution, though the gap is small.
Final Fantasy XIII
Paradigm shifts need timely menu reactions
The Witcher
Rhythm-click combat needs only loose timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XIII
Scripted stagger-phase bosses
The Witcher
Enemies follow fixed styles and weaknesses
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XIII
Minor randomness in enemy actions
The Witcher
Some unknown quest outcomes on first play
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XIII
Paradigm sequencing and stagger timing are solvable
The Witcher
Signs, potions, and style matchups form the real game
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.