head to head
Grand Theft Auto V asks more than Top Gear 2, and the gap is reads.

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

Execution · Practiced Mastery
Track memorisation and upgrade economy layered under straightforward racing execution.
Grand Theft Auto V leans Execution (Practiced Mastery); Top Gear 2 leans Execution (Practiced Mastery).
Top Gear 2 leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Top Gear 2
Clean cornering and nitro timing decide finishing position
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Top Gear 2
AI racers follow fixed rubber-band behaviour
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Top Gear 2
Tracks and hazards are identical every championship
Top Gear 2 leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Top Gear 2
Upgrade purchase order and track memorisation compound advantages
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.