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

Execution · Practiced Mastery
A beloved Capcom arcade brawler mixing dinosaurs, gangs, and Cadillac-driving heroes.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Cadillacs and Dinosaurs leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Cadillacs and Dinosaurs leans clearly harder on execution.
Cadillacs and Dinosaurs
Combo chains, weapon pickups, and spacing skill
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Cadillacs and Dinosaurs
Poachers follow scripted arcade AI
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.
Cadillacs and Dinosaurs
Weapon and food drop placement varies slightly
Grand Theft Auto V
Some mission and lobby randomness.
Cadillacs and Dinosaurs leans a little harder on optimization, though the gap is small.
Cadillacs and Dinosaurs
One-credit routing and boss pattern memorization
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.