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

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

Execution · Practiced Mastery
Routing and executing perfect scoring runs through scripted shooting arenas.
Grand Theft Auto V leans Execution (Practiced Mastery); The Club leans Execution (Practiced Mastery).
The Club leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
The Club
Chaining kills without dropping combo demands fast precise aim
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
The Club
Enemy spawns are scripted and memorisable
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
The Club
Nothing random once spawn layouts are learned
The Club leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
The Club
Score routes through each arena are the real puzzle
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.