head to head
Quake asks more than Soldier of Fortune, and the gap is execution.

Execution · Pure Mechanics
The original twitch FPS - movement tech and rockets define skill.

Execution · Pure Mechanics
A late-90s mercenary FPS infamous for its graphic locational damage system.
Quake leans Execution (Pure Mechanics); Soldier of Fortune leans Execution (Pure Mechanics).
Quake leans clearly harder on execution.
Quake
Rocket aim and movement tech ceiling massive.
Soldier of Fortune
Fast twitch aim against fragile enemies decides everything
Quake leans a little harder on reads, though the gap is small.
Quake
PvP duels involve real opponent modeling.
Soldier of Fortune
Multiplayer duels add a little human prediction
Soldier of Fortune leans a little harder on variance, though the gap is small.
Quake
Item timing deterministic once learned.
Soldier of Fortune
Campaign layouts and spawns are fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Quake
Map control and item routes solvable.
Soldier of Fortune
Weapon choice and level routes are 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.