head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

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

Execution · Grand Arena
Stick-skill shot timing plus scheme prediction against human opponents, layered on build optimisation.
Call of Duty: Modern Warfare 2 leans Execution (Competitive PvP); NBA 2K26 leans Execution (Grand Arena).
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
NBA 2K26
Shot timing, dribble combos and defensive sliding demand practiced sticks
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare 2
Outguessing human rotations and flanks
NBA 2K26
Online opponents bait coverages and adjust schemes constantly
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
NBA 2K26
Shooting RNG and card pulls inject noise
NBA 2K26 leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare 2
Killstreak economy, loadout and map knowledge
NBA 2K26
Builds, badge setups and playbook knowledge are studyable systems
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.