head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
The Wii U Smash that restored competitive pace and a huge roster of labbable kill confirms.

Execution · Competitive PvP
A competitive party platformer where placing obstacles to block others while surviving your own traps tests both execution and social prediction.
Super Smash Bros. for Wii U leans Execution (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.
Super Smash Bros. for Wii U
Perfect pivots and precise aerial spacing reward sharp hands.
Ultimate Chicken Horse
Precise platforming through player-built obstacle courses is the ceiling
Super Smash Bros. for Wii U leans a little harder on reads, though the gap is small.
Super Smash Bros. for Wii U
Ledge-trap and landing-trap guessing against humans never converges.
Ultimate Chicken Horse
Predicting what obstacles opponents will place is genuine social reads
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Smash Bros. for Wii U
Tripping removed; only minor move RNG remains.
Ultimate Chicken Horse
Block placement creates novel layouts each round
Super Smash Bros. for Wii U leans a little harder on optimization, though the gap is small.
Super Smash Bros. for Wii U
Rage mechanics and kill-confirm percents are deeply labbable.
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.