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

Execution · Competitive PvP
Mobile shooter execution with human prediction, plus loot variance in battle royale.

Execution · Competitive PvP
Arcade basketball testing twitch timing and head-to-head prediction over deliberate chaos.
Call of Duty: Mobile leans Execution (Competitive PvP); NBA Jam Tournament Edition leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Mobile
Touch or controller aim and movement decide gunfights
NBA Jam Tournament Edition
Turbo timing, steals and shot releases reward fast hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Mobile
Human lobbies adapt rotations and peeks each match
NBA Jam Tournament Edition
Head-to-head play is constant guessing of the other player
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Mobile
Battle royale drops and loot add run-to-run randomness
NBA Jam Tournament Edition
On-fire mechanics and rubber-banding inject chaos
Call of Duty: Mobile leans a little harder on optimization, though the gap is small.
Call of Duty: Mobile
Loadout meta and map spawn knowledge reward study
NBA Jam Tournament Edition
Roster picks and hot-spot knowledge add a thin 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.