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

Execution · Practiced Mastery
Era-typical console shooting skill across scripted spy missions and couch multiplayer.

Execution · Pure Mechanics
A gory budget FPS testing twitch aim through linear scripted firefights.
James Bond 007: Nightfire leans Execution (Practiced Mastery); Soldier of Fortune: Payback leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
James Bond 007: Nightfire
Console aim and gadget timing carry campaign and splitscreen
Soldier of Fortune: Payback
Twitch gunfights against aggressive AI are the core
James Bond 007: Nightfire leans a little harder on reads, though the gap is small.
James Bond 007: Nightfire
Splitscreen friends can be predicted; bots cannot
Soldier of Fortune: Payback
Multiplayer existed but campaign AI never adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
James Bond 007: Nightfire
Levels and AI behaviour are fixed and learnable
Soldier of Fortune: Payback
Linear levels hold few surprises
James Bond 007: Nightfire leans a little harder on optimization, though the gap is small.
James Bond 007: Nightfire
Route and gadget usage per mission is solvable
Soldier of Fortune: Payback
Loadout picks add only a thin layer
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.