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

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

Execution · Practiced Mastery
Top-down aim and kiting against scripted alien swarms with light upgrade planning.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Shadowgrounds leans Execution (Practiced Mastery).
Shadowgrounds leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Shadowgrounds
Kiting alien swarms top-down rewards steady aim and movement
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
Shadowgrounds
Aliens charge on simple scripts, never modelling you
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
Shadowgrounds
Ambush triggers are scripted-but-unknown on first playthrough
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
Shadowgrounds
Weapon upgrade routing is a light solvable layer
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.