head to head
Call of Duty: Modern Warfare 2 asks more than Mortal Kombat: Deception, and the gap is variance.

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

Execution · Competitive PvP
The Deadly Alliance follow-up adding combo breakers, death traps, and online play.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); Mortal Kombat: Deception leans Execution (Competitive PvP).
Call of Duty: Modern Warfare 2 leans a little harder on execution, though the gap is small.
Call of Duty: Modern Warfare 2
Fast time-to-kill rewards raw aim and reflex
Mortal Kombat: Deception
Style strings plus stage-hazard spacing demand control
Mortal Kombat: Deception leans a little harder on reads, though the gap is small.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
Mortal Kombat: Deception
Human opponents bait death traps and breakers
Call of Duty: Modern Warfare 2 leans clearly harder on variance.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
Mortal Kombat: Deception
Deterministic outside known stage hazards
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
Mortal Kombat: Deception
Combo routes and hazard positioning are lab work
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.