head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Grand Arena
A tag-team 3D fighter layering team optimization onto Tekken's execution and reads core.

Execution · Grand Arena
A refined KOF entry that lowers the execution bar slightly while preserving the team-order reads and punish game.
Tekken Tag Tournament leans Execution (Grand Arena); The King of Fighters XV leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken Tag Tournament
Tag combos and netsu juggles demand precise inputs
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 Tag Tournament
Tag timing adds another layer of human mind-games
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 Tag Tournament
Open information; nothing hidden between rounds
The King of Fighters XV
No RNG; all information is visible in the match
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Tekken Tag Tournament
Team synergy and tag combo routing are optimizable systems
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.