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

Optimization · Practiced Mastery
Galaxy-spanning space sim about flight and trade.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Elite Dangerous leans Optimization (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Elite Dangerous leans a little harder on execution, though the gap is small.
Elite Dangerous
Flight controls, docking, combat aim
Grand Theft Auto V
Driving and shooting demand decent inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Elite Dangerous
Light PvP reads, mostly PvE
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Elite Dangerous leans a little harder on variance, though the gap is small.
Elite Dangerous
Procedural galaxy, mission variance
Grand Theft Auto V
Some mission and lobby randomness.
Elite Dangerous leans clearly harder on optimization.
Elite Dangerous
Ship build, trade routes, engineering grind
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.