head to head
Command & Conquer 3: Tiberium Wars asks more than DCS World, and the gap is reads.

Optimization · Grand Arena
Fast tiberium-economy RTS with a once-thriving competitive 1v1 scene.

Optimization · Practiced Mastery
A study-level combat flight sim where mastering each aircraft's real systems is the price of entry.
Command & Conquer 3: Tiberium Wars leans Optimization (Grand Arena); DCS World leans Optimization (Practiced Mastery).
DCS World leans a little harder on execution, though the gap is small.
Command & Conquer 3: Tiberium Wars
Fast micro on squads and harvesters
DCS World
Precise stick-and-throttle handling and BFM have a high ceiling.
Command & Conquer 3: Tiberium Wars leans clearly harder on reads.
Command & Conquer 3: Tiberium Wars
Ranked 1v1 rewards reading enemy tech paths
DCS World
Multiplayer dogfights against humans reward genuine prediction.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer 3: Tiberium Wars
Fog hides tech switches until scouted
DCS World
Sensor fog of war and unseen contacts hide information.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer 3: Tiberium Wars
Tight build orders and tiberium control
DCS World
Full-fidelity avionics, weapons and tactics are a vast learnable system.
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.