head to head
Dune 2000 asks more than Grand Theft Auto V, and the gap is optimization.

Optimization · Practiced Mastery
Spice economy management and build-order knowledge with modest micro demands.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Dune 2000 leans Optimization (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dune 2000
Unit micro and build speed matter at competitive pace
Grand Theft Auto V
Driving and shooting demand decent inputs.
Dune 2000 leans a little harder on reads, though the gap is small.
Dune 2000
Human skirmishes add some build-order mind games
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.
Dune 2000
Fog of war hides enemy composition until scouted
Grand Theft Auto V
Some mission and lobby randomness.
Dune 2000 leans clearly harder on optimization.
Dune 2000
Spice economy and build orders decide most games
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.