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

Execution · Competitive PvP
A shallow novelty wrestler testing little beyond basic timing and weapon grabs.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Celebrity Deathmatch leans Execution (Competitive PvP); 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.
Celebrity Deathmatch
Button timing wins matches but the ceiling is low
Grand Theft Auto V
Driving and shooting demand decent inputs.
Celebrity Deathmatch leans a little harder on reads, though the gap is small.
Celebrity Deathmatch
A couch opponent can be conditioned, shallowly
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.
Celebrity Deathmatch
Random weapon drops shake up the ring
Grand Theft Auto V
Some mission and lobby randomness.
Grand Theft Auto V leans a little harder on optimization, though the gap is small.
Celebrity Deathmatch
Learning each celebrity's finisher exhausts the depth fast
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.