head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Competitive PvP
Simple-input arena fighting decided by baiting human defensive resources.

Execution · Competitive PvP
Reversal-timing duels where humans bait each other inside scripted spectacle.
Naruto Shippuden: Ultimate Ninja Storm Revolution leans Execution (Competitive PvP); WWE SmackDown vs. Raw 2011 leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto Shippuden: Ultimate Ninja Storm Revolution
Combo and counter timing on intentionally simple inputs
WWE SmackDown vs. Raw 2011
Reversal timing windows reward practiced reactions
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto Shippuden: Ultimate Ninja Storm Revolution
Baiting a human's substitutions and guard breaks matters
WWE SmackDown vs. Raw 2011
Versus humans, reversal baiting becomes a guessing duel
WWE SmackDown vs. Raw 2011 leans a little harder on variance, though the gap is small.
Naruto Shippuden: Ultimate Ninja Storm Revolution
Fully visible fights with nothing hidden
WWE SmackDown vs. Raw 2011
Momentum swings and AI quirks add mild chaos
WWE SmackDown vs. Raw 2011 leans a little harder on optimization, though the gap is small.
Naruto Shippuden: Ultimate Ninja Storm Revolution
Team and awakening type picks are a shallow solvable layer
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.
full breakdown
Naruto Shippuden: Ultimate Ninja Storm Revolution →
full breakdown
WWE SmackDown vs. Raw 2011 →