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
A chaotic co-op action game where wizards combine eight elements into thousands of spells, often frying each other.

Optimization · Practiced Mastery
A punishing Soviet off-road logging sim about dragging timber through near-impassable mud.
Magicka leans Optimization (Practiced Mastery); MudRunner leans Optimization (Practiced Mastery).
Magicka leans a little harder on execution, though the gap is small.
Magicka
Typing element combos quickly mid-combat is the hands test
MudRunner
Careful throttle, diff-lock and winch control matter constantly.
Magicka leans a little harder on reads, though the gap is small.
Magicka
Enemies are scripted; friendly fire isn't adaptive
MudRunner
No opponent of any kind.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Magicka
Co-op friendly-fire chaos adds unpredictability
MudRunner
Deforming mud behaves unpredictably until mapped.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Magicka
Discovering and exploiting spell combinations dominates
MudRunner
Fuel, load and route planning across the map is the core test.
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.