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 · Competitive PvP
A platform fighter built on tight inputs and dodge-read mind games.

Execution · Competitive PvP
A combo-centric fighting game built around the breaker guessing game.
Brawlhalla leans Execution (Competitive PvP); Killer Instinct 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.
Brawlhalla
Frame-tight inputs and recoveries decide stocks.
Killer Instinct
Long combo execution and breaker timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Brawlhalla
Adaptive opponents bait dodges and reads constantly.
Killer Instinct
Combo-breaker guessing is a live mind game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Brawlhalla
Weapon spawns add minor randomness.
Killer Instinct
Full information fighter
Killer Instinct leans a little harder on optimization, though the gap is small.
Brawlhalla
Matchup knowledge and stage control are learnable.
Killer Instinct
Frame data and matchup 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.