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
Painterly cinematic puzzle platformer about a girl and her cat-like companion.

Optimization · Pure Optimization
Tests creative vocabulary - conjuring the right modified object for each fixed puzzle.
Planet of Lana leans Optimization (Practiced Mastery); Super Scribblenauts leans Optimization (Pure Optimization).
Planet of Lana leans a little harder on execution, though the gap is small.
Planet of Lana
Gentle platforming and chase sequences
Super Scribblenauts
Stylus control matters slightly, never decisively
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Planet of Lana
Machines follow scripted patterns
Super Scribblenauts
Solo sandbox - nothing models you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Planet of Lana
Fully authored puzzles
Super Scribblenauts
Puzzles are fixed; your vocabulary is the only variable
Super Scribblenauts leans a little harder on optimization, though the gap is small.
Planet of Lana
Companion-command puzzles have single solutions
Super Scribblenauts
Finding object-adjective combos that satisfy each puzzle 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.