head to head
Neither is simply harder - they are hard in different places. Grand Theft Auto V demands more reads; Tomb Raider II demands more optimization.

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

Optimization · Practiced Mastery
A trap-heavy sequel where level knowledge beats reflexes.
Grand Theft Auto V leans Execution (Practiced Mastery); Tomb Raider II leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Tomb Raider II
Precise platforming plus more frequent gunplay
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Tomb Raider II
Human enemies still run fixed scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Some mission and lobby randomness.
Tomb Raider II
Unknown traps and ambushes punish first runs
Tomb Raider II leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Tomb Raider II
Route, key-item, and secret solving dominate
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.