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

Optimization · Pure Optimization
Pure logical deduction - each nonogram is fully solvable from its number clues.

Optimization · Pure Optimization
A first-person puzzler on Europa where you route energy orbs through chambers while debating machine consciousness.
Mario's Super Picross leans Optimization (Pure Optimization); The Turing Test leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Mario's Super Picross
Marking cells has no speed pressure worth naming
The Turing Test
No dexterity pressure at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Mario's Super Picross
A logic grid cannot adapt to you
The Turing Test
No opponent, only puzzles
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario's Super Picross
The hidden picture is fully derivable from the clues
The Turing Test
Solutions hidden only until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mario's Super Picross
Pure logical deduction - every puzzle is literally solvable
The Turing Test
Each energy-orb chamber has a fixed solution
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.