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 · Practiced Mastery
A team shooter where aim and positioning against human opponents controls the map.

Execution · Grand Arena
A classic football simulation with tactical team management.
Splatoon 2 leans Execution (Practiced Mastery); Winning Eleven: Pro Evolution Soccer 2007 leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Splatoon 2
aim and movement decide ink battles
Winning Eleven: Pro Evolution Soccer 2007
passing/shooting timing needs real precision
Winning Eleven: Pro Evolution Soccer 2007 leans a little harder on reads, though the gap is small.
Splatoon 2
predicting human opponent positioning
Winning Eleven: Pro Evolution Soccer 2007
human opponents adapt tactics against you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Splatoon 2
weapon and map rotation randomness
Winning Eleven: Pro Evolution Soccer 2007
minor ball-physics randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Splatoon 2
loadout and turf strategy solvable
Winning Eleven: Pro Evolution Soccer 2007
tactics and formations are learnable systems
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.