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
Linear military FPS about resisting an occupation of the United States.

Execution · Practiced Mastery
A gritty crime shooter following two doomed mercenaries through botched heists.
Homefront leans Execution (Pure Mechanics); Kane & Lynch: Dead Men leans Execution (Practiced Mastery).
Homefront leans a little harder on execution, though the gap is small.
Homefront
Standard shooter gunplay carries the campaign
Kane & Lynch: Dead Men
Cover shooting accuracy under pressure
Homefront leans a little harder on reads, though the gap is small.
Homefront
Multiplayer adds some human prediction
Kane & Lynch: Dead Men
Fragile Alliance betrayals add faint human guessing
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Homefront
Scripted setpieces, little randomness
Kane & Lynch: Dead Men
Set-piece encounters vary little
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Homefront
Modest loadout and map knowledge layer
Kane & Lynch: Dead Men
Squad orders and encounter knowledge
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.