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
Lab-honed combo execution plus live mixup guessing against adapting human opponents.

Execution · Competitive PvP
The classic 'dream match' team fighter widely held as KOF's most balanced competitive entry.
Skullgirls: 2nd Encore leans Execution (Competitive PvP); The King of Fighters '98 leans Execution (Competitive PvP).
Skullgirls: 2nd Encore leans a little harder on execution, though the gap is small.
Skullgirls: 2nd Encore
Long combo routes and tight conversions demand serious hands
The King of Fighters '98
Strict inputs, short hops, tight punishes
The King of Fighters '98 leans a little harder on reads, though the gap is small.
Skullgirls: 2nd Encore
Mixups and resets only work by out-guessing a human
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.
Skullgirls: 2nd Encore
Fully deterministic fighter with nothing hidden
The King of Fighters '98
Near-fully visible game state
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Skullgirls: 2nd Encore
Team composition, assists and combo theory go deep
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.