head to head
Call of Duty: Modern Warfare 2 asks more than Naruto Shippuden: Ultimate Ninja Storm Revolution, and the gap is execution.

Execution · Competitive PvP
Blockbuster 2009 sequel famous for killstreak chains and frantic multiplayer.

Execution · Competitive PvP
Simple-input arena fighting decided by baiting human defensive resources.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Naruto Shippuden: Ultimate Ninja Storm Revolution leans Execution (Competitive PvP).
Call of Duty: Modern Warfare 2 leans clearly harder on execution.
Call of Duty: Modern Warfare 2
Fast time-to-kill rewards raw aim and reflex
Naruto Shippuden: Ultimate Ninja Storm Revolution
Combo and counter timing on intentionally simple inputs
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Naruto Shippuden: Ultimate Ninja Storm Revolution
Baiting a human's substitutions and guard breaks matters
Call of Duty: Modern Warfare 2 leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Naruto Shippuden: Ultimate Ninja Storm Revolution
Fully visible fights with nothing hidden
Call of Duty: Modern Warfare 2 leans clearly harder on optimization.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Naruto Shippuden: Ultimate Ninja Storm Revolution
Team and awakening type picks are a shallow solvable layer
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
Call of Duty: Modern Warfare 2 →
full breakdown
Naruto Shippuden: Ultimate Ninja Storm Revolution →