head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
A puzzle-leaning platformer testing perspective-flip problem solving more than reflexes.

Optimization · Practiced Mastery
Solving physics puzzles by picking the right hero ability for each obstacle.
Super Paper Mario leans Optimization (Practiced Mastery); Trine 3: The Artifacts of Power 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.
Super Paper Mario
Light platforming demands, well below mainline Mario
Trine 3: The Artifacts of Power
Light platforming and physics manipulation, forgiving timing windows
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Super Paper Mario
Enemies follow simple fixed patterns, no adaptation
Trine 3: The Artifacts of Power
No adaptive opponents - puzzles and scripted enemies only
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Paper Mario
Dimension-flip secrets are scripted-but-unknown until found
Trine 3: The Artifacts of Power
Levels are fixed and fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Super Paper Mario
Solving levels via the 2D/3D flip mechanic is the core test
Trine 3: The Artifacts of Power
Choosing the right hero and physics solution is the game
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.