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

Execution · Pure Mechanics
Linear military FPS about resisting an occupation of the United States.

Execution · Practiced Mastery
Frozen-planet shooter about managing heat while gunning down giant bugs.
Homefront leans Execution (Pure Mechanics); Lost Planet: Extreme Condition 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.
Homefront
Standard shooter gunplay carries the campaign
Lost Planet: Extreme Condition
Grapple movement and Akrid weak-point shooting
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Homefront
Multiplayer adds some human prediction
Lost Planet: Extreme Condition
Multiplayer modes add some mind games
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
Lost Planet: Extreme Condition
Campaign encounters are fixed
Lost Planet: Extreme Condition leans a little harder on optimization, though the gap is small.
Homefront
Modest loadout and map knowledge layer
Lost Planet: Extreme Condition
Thermal energy management and boss weak points
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.