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.

Variance · Light / Casual
A choice-driven Batman story with negligible skill demands.

Optimization · Light / Casual
A branching story that tests choice exploration more than any skill.
Batman: The Telltale Series leans Variance (Light / Casual); Detroit: Become Human leans Optimization (Light / Casual).
Detroit: Become Human leans a little harder on execution, though the gap is small.
Batman: The Telltale Series
Quick-time combat is choreography, not skill
Detroit: Become Human
Quick-time events demand only basic reaction timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: The Telltale Series
Villains follow the script, never adapting
Detroit: Become Human
Branching script, no adaptive adversary
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Batman: The Telltale Series
Story branches are hidden information once through
Detroit: Become Human
Branch consequences are hidden information until explored
Detroit: Become Human leans a little harder on optimization, though the gap is small.
Batman: The Telltale Series
Detective scenes are guided with no real solving
Detroit: Become Human
Flowchart completion is a light solvable puzzle
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.