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 · Practiced Mastery
Memorising and rapidly inputting spell recipes while dodging your own friends.

Optimization · Pure Optimization
A hybrid real-time and tactical action RPG in a digital city.
Magicka 2 leans Optimization (Practiced Mastery); Transistor leans Optimization (Pure Optimization).
Magicka 2 leans a little harder on execution, though the gap is small.
Magicka 2
Typing element combos quickly mid-fight is the skill ceiling
Transistor
Real-time and planned hybrid combat.
Transistor leans a little harder on reads, though the gap is small.
Magicka 2
Enemies are scripted; friendly-fire chaos is not prediction
Transistor
Process enemies follow scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Magicka 2
Co-op misfires add slapstick randomness, little else
Transistor
Limited randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Magicka 2
Knowing the strongest spell recipes trivialises encounters
Transistor
Function loadouts have deep optimization.
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.