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
The infamous Atari 2600 adventure that is trivial once its obscure rules are known.

Optimization · Pure Optimization
A gentle turn-based system easily solved by build and gear choices.
E.T. the Extra-Terrestrial leans Optimization (Pure Optimization); South Park: The Stick of Truth leans Optimization (Pure Optimization).
South Park: The Stick of Truth leans a little harder on execution, though the gap is small.
E.T. the Extra-Terrestrial
Clumsy pit navigation, little dexterity
South Park: The Stick of Truth
Timed attack and block prompts add light input demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
E.T. the Extra-Terrestrial
No adaptive opposition
South Park: The Stick of Truth
Enemies follow fixed turn-based scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
E.T. the Extra-Terrestrial
Item locations vary per game
South Park: The Stick of Truth
Minor damage rolls; encounters are otherwise fixed
South Park: The Stick of Truth leans a little harder on optimization, though the gap is small.
E.T. the Extra-Terrestrial
Knowing the obtuse zone rules solves it quickly
South Park: The Stick of Truth
Build, gear and ability choices comfortably solve every fight
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.