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 · Pure Mechanics
WWII gunfight execution with light multiplayer prediction.

Execution · Pure Mechanics
Twitch top-down driving and weapon chaos against friends on a couch.
Call of Duty 3 leans Execution (Pure Mechanics); Mashed: Drive to Survive leans Execution (Pure Mechanics).
Mashed: Drive to Survive leans a little harder on execution, though the gap is small.
Call of Duty 3
Aimbot trivialises both campaign and multiplayer gunfights
Mashed: Drive to Survive
Top-down cornering at speed while aiming weapons is twitchy
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
Mashed: Drive to Survive
Couch rivals bait blocks and time weapon strikes
Mashed: Drive to Survive leans a little harder on variance, though the gap is small.
Call of Duty 3
Scripted setpieces and spawn flow add minor unknowns
Mashed: Drive to Survive
Weapon pickups and missile strikes add party chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty 3
Map knowledge and weapon choice reward light study
Mashed: Drive to Survive
Track knowledge helps but stays shallow by design
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.