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

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

Execution · Twitch Chaos
Kart racing where drift skill fights against item-roll chaos on themed tracks.
Crash Tag Team Racing leans Execution (Practiced Mastery); Pac-Man World Rally leans Execution (Twitch Chaos).
Pac-Man World Rally leans a little harder on execution, though the gap is small.
Crash Tag Team Racing
Driving and turret aim ask moderate kid-friendly hands
Pac-Man World Rally
Drift timing and shortcut jumps decide clean laps
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
Pac-Man World Rally
Human races add light item-timing prediction
Pac-Man World Rally leans a little harder on variance, though the gap is small.
Crash Tag Team Racing
Item luck and clash chaos shake up races
Pac-Man World Rally
Item rolls scramble positions every race
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
Pac-Man World Rally
Track shortcuts and kart picks are learnable edges
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.