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 · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Execution · Practiced Mastery
A Pixar-styled action adventure about a spirit guide cleansing a corrupted forest.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Kena: Bridge of Spirits leans Execution (Practiced Mastery).
Kena: Bridge of Spirits leans a little harder on execution, though the gap is small.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Kena: Bridge of Spirits
Parry and dodge timing in boss fights
Kena: Bridge of Spirits leans a little harder on reads, though the gap is small.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Kena: Bridge of Spirits
Corrupted spirits are fully scripted
Grand Theft Auto: San Andreas leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Kena: Bridge of Spirits
World is fixed and explorable
Grand Theft Auto: San Andreas leans a little harder on optimization, though the gap is small.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Kena: Bridge of Spirits
Rot ability usage and boss pattern learning
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.