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

Execution · Practiced Mastery
A metroidvania testing boss-pattern execution and ability-loadout planning.

Execution · Practiced Mastery
GBA platformer where Wario smashes through puzzle levels and races escape timers for treasure.
Ender Magnolia: Bloom in the Mist leans Execution (Practiced Mastery); Wario Land 4 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Ender Magnolia: Bloom in the Mist
Boss dodge timing and aerial control gate progress
Wario Land 4
Frantic escape sequences demand tight platforming under timers
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ender Magnolia: Bloom in the Mist
Bosses cycle scripted attack patterns
Wario Land 4
Fixed scripted levels with no adaptive opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ender Magnolia: Bloom in the Mist
The map is fixed, just unexplored at first
Wario Land 4
Layouts fixed; only first-run secret discovery
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Ender Magnolia: Bloom in the Mist
Ability loadouts, upgrades and route knowledge shape the run
Wario Land 4
Treasure routing and frog-switch timing reward planning
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.