head to head
Assassin's Creed III: Liberation asks more than Grand Theft Auto V, and the gap is optimization.

Optimization · Practiced Mastery
A stealth-action adventure where Aveline swaps social personas to move through 18th-century New Orleans.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Assassin's Creed III: Liberation leans Optimization (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Grand Theft Auto V leans a little harder on execution, though the gap is small.
Assassin's Creed III: Liberation
Lenient parkour and counter combat set a low ceiling
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Assassin's Creed III: Liberation
Guards follow patrol scripts without adapting
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed III: Liberation
Light patrol and notoriety randomness
Grand Theft Auto V
Some mission and lobby randomness.
Assassin's Creed III: Liberation leans clearly harder on optimization.
Assassin's Creed III: Liberation
Persona disguise system and mission routing reward planning
Grand Theft Auto V
Heists, money loops, builds learnable.
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.