head to head
Crash Bash asks more than Call of Duty 3, and the gap is variance.

Execution · Pure Mechanics
WWII gunfight execution with light multiplayer prediction.

Execution · Competitive PvP
A Crash Bandicoot party collection of competitive arena minigames for up to four players.
Call of Duty 3 leans Execution (Pure Mechanics); Crash Bash leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty 3
Aimbot trivialises both campaign and multiplayer gunfights
Crash Bash
Minigame timing, mashing, and dodging decide most rounds
Crash Bash leans a little harder on reads, though the gap is small.
Call of Duty 3
Multiplayer adds modest human positional prediction
Crash Bash
Human rivals in versus minigames can be baited
Crash Bash leans clearly harder on variance.
Call of Duty 3
Scripted setpieces and spawn flow add minor unknowns
Crash Bash
Item drops and arena randomness swing rounds
Call of Duty 3 leans a little harder on optimization, though the gap is small.
Call of Duty 3
Map knowledge and weapon choice reward light study
Crash Bash
Light minigame strategies, quickly learned
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.