head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

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

Execution · Twitch Chaos
Sloppy kart handling where random items swing races more than driving skill.
Crash Tag Team Racing leans Execution (Practiced Mastery); South Park Rally leans Execution (Twitch Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Tag Team Racing
Driving and turret aim ask moderate kid-friendly hands
South Park Rally
Loose kart handling still rewards clean driving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Tag Team Racing
Clashing with humans adds slight positional guessing
South Park Rally
Human racers in versus add slight prediction
South Park Rally leans a little harder on variance, though the gap is small.
Crash Tag Team Racing
Item luck and clash chaos shake up races
South Park Rally
Random weapon pickups swing race outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crash Tag Team Racing
Track routes and car upgrades are quickly learnable
South Park Rally
Track shortcuts and item timing are learnable
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.