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

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

Execution · Practiced Mastery
An arena shooter testing kiting and aim with light perk-build planning underneath.
Grand Theft Auto V leans Execution (Practiced Mastery); Tesla vs. Lovecraft leans Execution (Practiced Mastery).
Tesla vs. Lovecraft leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Tesla vs. Lovecraft
Kiting swarms with twin-stick aim under pressure is the game
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Tesla vs. Lovecraft
Monster hordes follow simple scripted pursuit
Tesla vs. Lovecraft leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Tesla vs. Lovecraft
Random perk offers vary each run
Tesla vs. Lovecraft leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Tesla vs. Lovecraft
Perk synergies and weapon choices reward planning
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.