head to head
Nidhogg asks more than Ultimate Chicken Horse, and the gap is reads.

Reads · Competitive PvP
Minimalist fencing duel that is almost entirely about out-guessing one human.

Execution · Competitive PvP
A competitive party platformer where placing obstacles to block others while surviving your own traps tests both execution and social prediction.
Nidhogg leans Reads (Competitive PvP); Ultimate Chicken Horse 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.
Nidhogg
Sword-height changes and dive-kicks need quick hands
Ultimate Chicken Horse
Precise platforming through player-built obstacle courses is the ceiling
Nidhogg leans clearly harder on reads.
Nidhogg
Pure human duels of feints and conditioning
Ultimate Chicken Horse
Predicting what obstacles opponents will place is genuine social reads
Ultimate Chicken Horse leans a little harder on variance, though the gap is small.
Nidhogg
Symmetric deterministic arenas
Ultimate Chicken Horse
Block placement creates novel layouts each round
Ultimate Chicken Horse leans a little harder on optimization, though the gap is small.
Nidhogg
Small toolkit, little to solve beyond fundamentals
Ultimate Chicken Horse
Optimal obstacle placement strategies are learnable over sessions
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.