head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Practiced Mastery
Sega's arcade fantasy brawler of barbarians, dragons, and gnome-kicking for potions.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Golden Axe leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Golden Axe leans a little harder on execution, though the gap is small.
Golden Axe
Spacing, throws, and mount control under arcade pressure
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.
Golden Axe
Enemies are scripted; only co-op adds human texture
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.
Golden Axe
Enemy mixes vary little between credits
Grand Theft Auto V
Some mission and lobby randomness.
Golden Axe leans a little harder on optimization, though the gap is small.
Golden Axe
Wave patterns and magic usage are fully learnable
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.