head to head
Grand Theft Auto V asks more than Metro Exodus, and the gap is reads.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
Open-zone Metro entry trading tunnels for a cross-Russia survival journey.
Grand Theft Auto V leans Execution (Practiced Mastery); Metro Exodus 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.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Metro Exodus
open-zone gunplay and stealth takedowns
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Metro Exodus
human and mutant AI is mappable
Metro Exodus leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Metro Exodus
weather and patrols add mild uncertainty
Metro Exodus leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Metro Exodus
crafting, scavenging, and approach planning
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.