head to head
Neither is simply harder - they are hard in different places. Adidas Championship Football demands more reads; Grand Theft Auto: San Andreas demands more optimization.

Execution · Practiced Mastery
A licensed retro football simulation game.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.
Adidas Championship Football leans Execution (Practiced Mastery); Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery).
Adidas Championship Football leans clearly harder on execution.
Adidas Championship Football
passing and shooting control precision
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Adidas Championship Football leans clearly harder on reads.
Adidas Championship Football
human opponent prediction in multiplayer matches
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Adidas Championship Football
minor ball bounce randomness
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Adidas Championship Football
team tactics and formation setup
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.