head to head
Armored Core VI: Fires of Rubicon asks more than Grand Theft Auto V, and the gap is optimization.

Execution · Practiced Mastery
A fast mech-action game where assembling the right build and piloting it hard both decide bosses.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Armored Core VI: Fires of Rubicon leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Armored Core VI: Fires of Rubicon leans clearly harder on execution.
Armored Core VI: Fires of Rubicon
Boss fights demand sharp dodges and stagger timing
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.
Armored Core VI: Fires of Rubicon
Campaign bosses are scripted; PvP is niche
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Armored Core VI: Fires of Rubicon
Fixed encounters
Grand Theft Auto V
Some mission and lobby randomness.
Armored Core VI: Fires of Rubicon leans clearly harder on optimization.
Armored Core VI: Fires of Rubicon
Build crafting trivializes many bosses
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.