head to head
Neither is simply harder - they are hard in different places. Cybernator demands more execution; Grand Theft Auto V demands more reads.

Execution · Practiced Mastery
A weighty mech run-and-gun testing momentum control against memorised stages.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Cybernator leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Cybernator leans clearly harder on execution.
Cybernator
Heavy mech momentum makes precise dodging and aim genuinely hard
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Cybernator
Enemy mechs follow scripted patterns
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.
Cybernator
Fixed stages with nothing random
Grand Theft Auto V
Some mission and lobby randomness.
Cybernator leans a little harder on optimization, though the gap is small.
Cybernator
Weapon upgrade routing and boss patterns reward study
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.