head to head
Neither is simply harder - they are hard in different places. Crash Tag Team Racing demands more reads; Grand Theft Auto: San Andreas demands more optimization.

Execution · Practiced Mastery
Accessible kart racing where merging cars trades driving for turret chaos.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.
Crash Tag Team Racing leans Execution (Practiced Mastery); Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery).
Crash Tag Team Racing leans a little harder on execution, though the gap is small.
Crash Tag Team Racing
Driving and turret aim ask moderate kid-friendly hands
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Crash Tag Team Racing leans clearly harder on reads.
Crash Tag Team Racing
Clashing with humans adds slight positional guessing
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Crash Tag Team Racing leans a little harder on variance, though the gap is small.
Crash Tag Team Racing
Item luck and clash chaos shake up races
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Grand Theft Auto: San Andreas leans clearly harder on optimization.
Crash Tag Team Racing
Track routes and car upgrades are quickly learnable
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.