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

Variance · Systems & Chaos
A relaxed visual scan for hidden cats with nothing else underneath.

Variance · Light / Casual
A narrative horror experience testing curiosity more than any skill axis.
100 March Cats leans Variance (Systems & Chaos); MiSide leans Variance (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
100 March Cats
Clicking found cats takes no skill
MiSide
Walking and minigames make light physical demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
100 March Cats
Nothing adapts in a still picture
MiSide
Mita is a scripted character, not an adaptive mind
100 March Cats leans a little harder on variance, though the gap is small.
100 March Cats
Cat positions are unknown until spotted, once
MiSide
Story surprises are hidden only until experienced
MiSide leans a little harder on optimization, though the gap is small.
100 March Cats
Systematic screen-scanning is the only technique
MiSide
Linear narrative with simple puzzles to step through
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.