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
Football execution and human mind-games layered over tactical formation play.

Execution · Competitive PvP
Reversal-timing duels where humans bait each other inside scripted spectacle.
International Superstar Soccer Pro 98 leans Execution (Competitive PvP); WWE SmackDown vs. Raw 2011 leans Execution (Competitive PvP).
International Superstar Soccer Pro 98 leans a little harder on execution, though the gap is small.
International Superstar Soccer Pro 98
First-touch timing and finishing demand practiced hands
WWE SmackDown vs. Raw 2011
Reversal timing windows reward practiced reactions
International Superstar Soccer Pro 98 leans a little harder on reads, though the gap is small.
International Superstar Soccer Pro 98
Versus matches hinge on outguessing a human defender
WWE SmackDown vs. Raw 2011
Versus humans, reversal baiting becomes a guessing duel
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
International Superstar Soccer Pro 98
Bounces and deflections add bounded match chaos
WWE SmackDown vs. Raw 2011
Momentum swings and AI quirks add mild chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
International Superstar Soccer Pro 98
Formations and set-piece routines have learnable best answers
WWE SmackDown vs. Raw 2011
Move sets, match types and creation systems 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.