head to head
UEFA Champions League 1999/2000 asks more than Grand Theft Auto: San Andreas, and the gap is reads.

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

Execution · Practiced Mastery
A licensed soccer simulation following the Champions League tournament.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); UEFA Champions League 1999/2000 leans Execution (Practiced Mastery).
UEFA Champions League 1999/2000 leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
UEFA Champions League 1999/2000
passing and shooting require timing precision
UEFA Champions League 1999/2000 leans clearly harder on reads.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
UEFA Champions League 1999/2000
human opponents add some adaptive play
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
UEFA Champions League 1999/2000
ball physics create minor unpredictability
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
UEFA Champions League 1999/2000
tactics and formation choices matter
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.