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
Turn-based infiltration puzzles with fully solvable deterministic solutions.

Optimization · Pure Optimization
A long parade of self-contained logic puzzles wrapped in a mystery story.
Deus Ex GO leans Optimization (Pure Optimization); Professor Layton and the Diabolical Box 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.
Deus Ex GO
Turn-based taps, no dexterity at all
Professor Layton and the Diabolical Box
Stylus taps - zero dexterity demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Deus Ex GO
Guards move by fixed deterministic rules
Professor Layton and the Diabolical Box
No opponent; a parade of standalone brainteasers
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Deus Ex GO
Puzzle states are fully visible from the start
Professor Layton and the Diabolical Box
Puzzles are fixed; only their first encounter surprises
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Deus Ex GO
Each board is a literally solvable movement puzzle
Professor Layton and the Diabolical Box
Each brainteaser has one clean logical solution to find
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.