head to head
Naruto Shippuden: Ultimate Ninja Storm 3 asks more than The Simpsons Wrestling, and the gap is execution.

Execution · Competitive PvP
Arena fighting built on baiting substitutions and timing punishes against humans.

Execution · Light / Casual
A shallow mashy wrestler where exploiting janky moves beats any deep skill.
Naruto Shippuden: Ultimate Ninja Storm 3 leans Execution (Competitive PvP); The Simpsons Wrestling leans Execution (Light / Casual).
Naruto Shippuden: Ultimate Ninja Storm 3 leans clearly harder on execution.
Naruto Shippuden: Ultimate Ninja Storm 3
Substitution timing and combo confirms need decent hands
The Simpsons Wrestling
Mashy controls with little precision to reward
Naruto Shippuden: Ultimate Ninja Storm 3 leans clearly harder on reads.
Naruto Shippuden: Ultimate Ninja Storm 3
PvP revolves around baiting substitutions from human opponents
The Simpsons Wrestling
Versus humans involves light habit-reading
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto Shippuden: Ultimate Ninja Storm 3
Support meter and item randomness barely matter
The Simpsons Wrestling
Janky collision adds accidental randomness
Naruto Shippuden: Ultimate Ninja Storm 3 leans a little harder on optimization, though the gap is small.
Naruto Shippuden: Ultimate Ninja Storm 3
Team composition and awakening knowledge add a thin layer
The Simpsons Wrestling
Each character's spam-able power move is quickly found
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.