head to head
Call of Duty: Modern Warfare 2 asks more than Dragon Ball Z: Battle of Z, and the gap is execution.

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

Execution · Competitive PvP
A team arena brawler testing loose execution and squad composition over precision.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Dragon Ball Z: Battle of Z 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
Dragon Ball Z: Battle of Z
Aerial chases and ki timing need moderate hands
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Dragon Ball Z: Battle of Z
Team fights against humans involve loose target prediction
Call of Duty: Modern Warfare 2 leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Dragon Ball Z: Battle of Z
Little hidden beyond card drops for builds
Call of Duty: Modern Warfare 2 leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Dragon Ball Z: Battle of Z
Team synergy cards and role composition are the system 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.