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 · Pure Mechanics
WWII gunfight execution with light multiplayer prediction.

Execution · Practiced Mastery
Chaining flashy trick combos to fuel momentum-swinging Gamebreakers.
Call of Duty 3 leans Execution (Pure Mechanics); NBA Street leans Execution (Practiced Mastery).
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
NBA Street
Trick combos and Gamebreaker timing drive scoring
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty 3
Multiplayer adds modest human positional prediction
NBA Street
Local versus play rewards baiting steals and blocks
Call of Duty 3 leans a little harder on variance, though the gap is small.
Call of Duty 3
Scripted setpieces and spawn flow add minor unknowns
NBA Street
Courts and AI behaviour are deterministic
NBA Street leans a little harder on optimization, though the gap is small.
Call of Duty 3
Map knowledge and weapon choice reward light study
NBA Street
Trick-point economy and Gamebreaker management are the meta
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.