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

Execution · Practiced Mastery
Dodging scripted bullet patterns while solving each fight's pacifist logic.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Deltarune leans Execution (Practiced Mastery); Grand Theft Auto V 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.
Deltarune
Bullet-hell dodging in battles demands real reflexes
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Deltarune
Enemy patterns are charming but fully scripted
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Deltarune
Encounters and secrets are fixed once known
Grand Theft Auto V
Some mission and lobby randomness.
Deltarune leans a little harder on optimization, though the gap is small.
Deltarune
ACT routes, sparing logic and TP economy are solvable
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.