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 · Competitive PvP
The peak-era Konami football game prized for weighty, skill-driven match play.

Execution · Pure Mechanics
A simulation tennis game built around precise shot-timing rallies.
Pro Evolution Soccer 6 leans Execution (Competitive PvP); Top Spin 4 leans Execution (Pure Mechanics).
Top Spin 4 leans a little harder on execution, though the gap is small.
Pro Evolution Soccer 6
First touch, through balls, and dribbles demand precise control
Top Spin 4
Shot timing meter decides every rally
Pro Evolution Soccer 6 leans a little harder on reads, though the gap is small.
Pro Evolution Soccer 6
Versus matches are constant feint and positioning prediction
Top Spin 4
Human PvP rewards anticipating placement habits
Pro Evolution Soccer 6 leans a little harder on variance, though the gap is small.
Pro Evolution Soccer 6
Deflections and keeper spills add light randomness
Top Spin 4
Almost no randomness in ball physics
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 6
Formations and player roles are studyable
Top Spin 4
Player builds and court tactics are learnable
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.