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.

Optimization · Systems & Chaos
A co-op party puzzle where one player defuses a bomb others describe from a manual.

Optimization · Practiced Mastery
Routing efficient digs and upgrades through a randomised mine.
Keep Talking and Nobody Explodes leans Optimization (Systems & Chaos); SteamWorld Dig leans Optimization (Practiced Mastery).
SteamWorld Dig leans a little harder on execution, though the gap is small.
Keep Talking and Nobody Explodes
Defusing under a timer punishes fumbling
SteamWorld Dig
Digging and platforming need modest precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Keep Talking and Nobody Explodes
The bomb never adapts to you
SteamWorld Dig
Enemies follow simple fixed patterns
Keep Talking and Nobody Explodes leans a little harder on variance, though the gap is small.
Keep Talking and Nobody Explodes
Random module combinations every bomb
SteamWorld Dig
Randomised mine layouts hide ore and hazards each run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Keep Talking and Nobody Explodes
Mastering the manual turns chaos into procedure
SteamWorld Dig
Upgrade routing and efficient dig paths drive progress
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.