head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Turn-based tactics where movement combos turn battles into solvable puzzles.

Optimization · Pure Optimization
Tests party building and turn-by-turn resource play across explorable fixed dungeons.
Mario + Rabbids Kingdom Battle leans Optimization (Pure Optimization); Might & Magic X: Legacy leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario + Rabbids Kingdom Battle
Turn-based; no dexterity gate
Might & Magic X: Legacy
Turn-based grid steps - no dexterity needed
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario + Rabbids Kingdom Battle
Enemy AI follows predictable rules
Might & Magic X: Legacy
Monsters use fixed behaviours, never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario + Rabbids Kingdom Battle
Hit chances are mostly deterministic percentages
Might & Magic X: Legacy
Dungeon contents are scripted-but-unknown until explored
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario + Rabbids Kingdom Battle
Movement chains and team-jump routing are puzzle-solvable
Might & Magic X: Legacy
Party builds, skill grandmastery and turn economy are the whole game
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.