head to head
Call of Duty: Modern Warfare 2 asks more than WWE 2K Battlegrounds, and the gap is execution.

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

Execution · Competitive PvP
Arcade wrestling that tests reversal timing and little else by design.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); WWE 2K Battlegrounds 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
WWE 2K Battlegrounds
Button-mash combos and reversal timing set the pace
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
WWE 2K Battlegrounds
Human opponents add light reversal mind games
Call of Duty: Modern Warfare 2 leans a little harder on variance, though the gap is small.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
WWE 2K Battlegrounds
Power-ups and interactive arenas inject party chaos
Call of Duty: Modern Warfare 2 leans clearly harder on optimization.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
WWE 2K Battlegrounds
Shallow systems - move knowledge helps a little
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.