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

Optimization · Practiced Mastery
A darkly comic action game where you herd colour-coded minion hordes as an evil overlord.

Optimization · Practiced Mastery
Tests upgrade economy and lane prioritisation in a defense shooter.
Overlord leans Optimization (Practiced Mastery); The Culling of the Cows leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Overlord
Sweeping minion hordes takes modest dexterity
The Culling of the Cows
Aimed shots at lanes need modest timing
Overlord leans a little harder on reads, though the gap is small.
Overlord
Scripted heroes and creatures
The Culling of the Cows
Waves are scripted with no adaptation
The Culling of the Cows leans a little harder on variance, though the gap is small.
Overlord
Fixed level design
The Culling of the Cows
Mutation timing adds small surprises
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Overlord
Minion type usage and upgrade economy reward planning
The Culling of the Cows
Upgrade economy and lane priorities are the solvable core
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.