head to head
Call of Duty: Modern Warfare 2 asks more than WWF In Your House, and the gap is execution.

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

Execution · Competitive PvP
An arcade wrestling fighter testing move timing and reading human opponents.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); WWF In Your House 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
WWF In Your House
Timing strikes and special-move inputs decides matches
Call of Duty: Modern Warfare 2 leans clearly harder on reads.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
WWF In Your House
Human opponents can be read in multiplayer brawls
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2
Spawn flips and killstreak randomness
WWF In Your House
Some randomness in move outcomes
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
WWF In Your House
Knowing finisher setups and combos underpins wins
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.