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

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

Execution · Practiced Mastery
Cyberpunk single-player arena shooter about blowing up robots with an upgradeable two-gun arsenal.
Grand Theft Auto V leans Execution (Practiced Mastery); Hard Reset leans Execution (Practiced Mastery).
Hard Reset leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Hard Reset
Fast strafing, aim, and environmental shot timing
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Hard Reset
Robot waves are scripted, never adaptive
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Hard Reset
Fixed arenas with minor spawn shuffle
Hard Reset leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Hard Reset
Weapon upgrade paths and explosive environment routing
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.