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 · Grand Arena
A weapons-based 3D fighter where Reversal Edge decisions and ring positioning create constant human reads.

Execution · Competitive PvP
The classic 'dream match' team fighter widely held as KOF's most balanced competitive entry.
SoulCalibur VI leans Execution (Grand Arena); The King of Fighters '98 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.
SoulCalibur VI
Reversal Edge timing and long lethal hit strings require tight execution
The King of Fighters '98
Strict inputs, short hops, tight punishes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
Reversal Edge is a pure read-off mechanic against human opponents
The King of Fighters '98
Human opponents constantly adapt and condition you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
No RNG; ring position is full information
The King of Fighters '98
Near-fully visible game state
SoulCalibur VI leans a little harder on optimization, though the gap is small.
SoulCalibur VI
Soul Charge routes and matchup character knowledge reward study
The King of Fighters '98
Team order and matchup theory 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.