head to head
Nidhogg asks more than Divekick, and the gap is execution.

Reads · Pure Mind Games
A two-button parody fighter that strips fighting games down to pure one-hit-kill spacing reads.

Reads · Competitive PvP
Minimalist fencing duel that is almost entirely about out-guessing one human.
Divekick leans Reads (Pure Mind Games); Nidhogg leans Reads (Competitive PvP).
Nidhogg leans clearly harder on execution.
Divekick
Two buttons, one-hit kills; almost no physical ceiling.
Nidhogg
Sword-height changes and dive-kicks need quick hands
Divekick leans a little harder on reads, though the gap is small.
Divekick
Pure spacing yomi against an adapting human is the entire game.
Nidhogg
Pure human duels of feints and conditioning
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Divekick
Fully deterministic.
Nidhogg
Symmetric deterministic arenas
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Divekick
Character angles and gem choices are quickly mapped.
Nidhogg
Small toolkit, little to solve beyond fundamentals
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.