head to head
Unturned 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.

Optimization · Practiced Mastery
A blocky free-to-play zombie survival sandbox mixing scavenging, basebuilding, and PvP.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Unturned leans Optimization (Practiced Mastery).
Unturned leans a little harder on execution, though the gap is small.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Unturned
Gunfights and driving reward aim and control
Unturned leans clearly harder on reads.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Unturned
Human raiders and ambushes on PvP servers
Unturned leans clearly harder on variance.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Unturned
Loot spawns and unknown player positions
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
Unturned
Base building, loot routes, and crafting economy
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.