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
A combo-heavy 3D fighter where lab-trained hands meet live human prediction.

Execution · Grand Arena
A refined KOF entry that lowers the execution bar slightly while preserving the team-order reads and punish game.
Tekken 6 leans Execution (Competitive PvP); The King of Fighters XV leans Execution (Grand Arena).
Tekken 6 leans a little harder on execution, though the gap is small.
Tekken 6
Bound combos and movement push a high physical ceiling
The King of Fighters XV
Shatter Strike and MAX Mode combos demand practiced precise inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken 6
Rage comebacks amplify the human guessing game
The King of Fighters XV
Team order choices and opponent habit exploitation remain central
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken 6
Visible state; nothing meaningfully random
The King of Fighters XV
No RNG; all information is visible in the match
The King of Fighters XV leans a little harder on optimization, though the gap is small.
Tekken 6
Optimal bound routes and punishment charts are lab work
The King of Fighters XV
Team construction and MAX Mode routing reward study
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.