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

Optimization · Pure Optimization
An open-world shooter-RPG won by perk routing and weapon mod optimization.

Optimization · Practiced Mastery
Memorising and rapidly inputting spell recipes while dodging your own friends.
Fallout 4 leans Optimization (Pure Optimization); Magicka 2 leans Optimization (Practiced Mastery).
Magicka 2 leans a little harder on execution, though the gap is small.
Fallout 4
FPS aiming, VATS softens demand
Magicka 2
Typing element combos quickly mid-fight is the skill ceiling
Fallout 4 leans a little harder on reads, though the gap is small.
Fallout 4
Scripted enemy AI
Magicka 2
Enemies are scripted; friendly-fire chaos is not prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
Loot and legendary rolls
Magicka 2
Co-op misfires add slapstick randomness, little else
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout 4
Perks, settlement, weapon mod planning
Magicka 2
Knowing the strongest spell recipes trivialises encounters
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.