head to head
Terra Nova: Strike Force Centauri asks more than Grand Theft Auto: San Andreas, and the gap is execution.

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

Execution · Practiced Mastery
Looking Glass's 1996 squad-command sim of powered-armor combat on alien battlefields.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Terra Nova: Strike Force Centauri leans Execution (Practiced Mastery).
Terra Nova: Strike Force Centauri leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Terra Nova: Strike Force Centauri
Piloting powered armor and aiming under fire is demanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Terra Nova: Strike Force Centauri
Enemy forces follow mission scripts, never adapt
Terra Nova: Strike Force Centauri leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Terra Nova: Strike Force Centauri
Unknown enemy placements on first mission attempts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Terra Nova: Strike Force Centauri
Squad orders, loadouts and approach routes are plannable
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.