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 · Practiced Mastery
A European football management-and-play simulation.

Execution · Practiced Mastery
The sequel adding Horde mode to the campaign-plus-versus cover shooter formula.
EuroLeague Football leans Execution (Practiced Mastery); Gears of War 2 leans Execution (Practiced Mastery).
Gears of War 2 leans a little harder on execution, though the gap is small.
EuroLeague Football
passing and shooting require timing precision
Gears of War 2
Gnasher battles and movement tech set the ceiling
Gears of War 2 leans a little harder on reads, though the gap is small.
EuroLeague Football
human opponents add some adaptive play
Gears of War 2
Human opponents in versus drive prediction play
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
EuroLeague Football
ball physics create minor unpredictability
Gears of War 2
Horde spawns add mild randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
EuroLeague Football
tactics and squad management matter significantly
Gears of War 2
Power-weapon timing and positioning are solvable
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.