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

Execution · Pure Mechanics
A motion-control party collection testing full-body timing and little else.
Homefront leans Execution (Pure Mechanics); Kinect Sports: Season Two 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.
Homefront
Standard shooter gunplay carries the campaign
Kinect Sports: Season Two
Full-body motion timing is the entire skill surface
Homefront leans a little harder on reads, though the gap is small.
Homefront
Multiplayer adds some human prediction
Kinect Sports: Season Two
Party opponents barely reward prediction
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
Kinect Sports: Season Two
Sensor reading adds unintended noise
Homefront leans a little harder on optimization, though the gap is small.
Homefront
Modest loadout and map knowledge layer
Kinect Sports: Season Two
Minigames have little system depth to solve
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.