head to head
Downhill Domination asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Twitch steering down mountain courses while learning shortcuts and boost lines.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Downhill Domination leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Downhill Domination leans clearly harder on execution.
Downhill Domination
High-speed downhill steering, tricks and combat demand twitch control
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.
Downhill Domination
Rival riders are AI patterns; light versus play adds little
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.
Downhill Domination
Pickup spawns and rubber-banding add mild chaos
Grand Theft Auto V
Some mission and lobby randomness.
Downhill Domination leans a little harder on optimization, though the gap is small.
Downhill Domination
Shortcut knowledge and trick-boost management compound speed
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.