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

Optimization · Pure Optimization
LucasArts adventure sending Indy down three routes toward Atlantis.

Optimization · Pure Optimization
A hidden-object adventure about searching scenes and solving fixed puzzles.
Indiana Jones and the Fate of Atlantis leans Optimization (Pure Optimization); Mystery Case Files: 13th Skull 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.
Indiana Jones and the Fate of Atlantis
Pointing and clicking, light fistfight option
Mystery Case Files: 13th Skull
Pointing and clicking, no twitch demand
Mystery Case Files: 13th Skull leans a little harder on reads, though the gap is small.
Indiana Jones and the Fate of Atlantis
No adaptive opposition
Mystery Case Files: 13th Skull
No adaptive opponent, puzzles are fixed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Indiana Jones and the Fate of Atlantis
Solutions hidden until reasoned out
Mystery Case Files: 13th Skull
Hidden-object locations unknown until searched
Indiana Jones and the Fate of Atlantis leans a little harder on optimization, though the gap is small.
Indiana Jones and the Fate of Atlantis
Three-path puzzle chains reward deduction
Mystery Case Files: 13th Skull
Solving puzzles and finding objects is the whole loop
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.
full breakdown
Indiana Jones and the Fate of Atlantis →
full breakdown
Mystery Case Files: 13th Skull →