head to head
Her Story asks more than Replica, and the gap is optimization.

Optimization · Systems & Chaos
A search-based detective game piecing together police interview footage.

Variance · Systems & Chaos
Surveillance-state deduction from hidden information inside a stranger's phone.
Her Story leans Optimization (Systems & Chaos); Replica leans Variance (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Her Story
Typing search terms only.
Replica
Tapping a simulated phone needs no skill
Her Story leans a little harder on reads, though the gap is small.
Her Story
Subject is recorded, not adaptive.
Replica
The state's demands follow a fixed script
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Her Story
Hidden clips revealed by guessed keywords.
Replica
Passwords and incriminating clues are hidden until cross-referenced
Her Story leans clearly harder on optimization.
Her Story
Efficient search strategy reconstructs the case.
Replica
Deduction from phone contents has discrete solutions per ending
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.