head to head
ModNation Racers: Road Trip asks more than Grand Theft Auto V, and the gap is variance.

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

Execution · Practiced Mastery
A kart racer testing driving precision and item management on user-created tracks.
Grand Theft Auto V leans Execution (Practiced Mastery); ModNation Racers: Road Trip leans Execution (Practiced Mastery).
ModNation Racers: Road Trip leans a little harder on execution, though the gap is small.
Grand Theft Auto V
Driving and shooting demand decent inputs.
ModNation Racers: Road Trip
Drifting and boosting at speed demands driving precision
ModNation Racers: Road Trip leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
ModNation Racers: Road Trip
Versus humans, anticipating weapon use matters somewhat
ModNation Racers: Road Trip leans clearly harder on variance.
Grand Theft Auto V
Some mission and lobby randomness.
ModNation Racers: Road Trip
Item pickups and weapon spread add kart-racer chaos
ModNation Racers: Road Trip leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
ModNation Racers: Road Trip
Track lines, boost management and shortcuts 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.