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

Optimization · Pure Optimization
A match-three puzzle about planning rune swaps to clear themed wonder boards.

Optimization · Pure Optimization
Side-on turn-based tactics where you manually aim ricocheting bullets for a steambot pirate crew.
7 Wonders of the Ancient World leans Optimization (Pure Optimization); SteamWorld Heist 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.
7 Wonders of the Ancient World
Quick swaps under time pressure matter somewhat
SteamWorld Heist
Manual aim and ricochet shots reward steady hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
7 Wonders of the Ancient World
Solo match-three, no opponent to predict
SteamWorld Heist
Enemy bots follow fixed behaviors
7 Wonders of the Ancient World leans a little harder on variance, though the gap is small.
7 Wonders of the Ancient World
Random rune drops drive each board's possibilities
SteamWorld Heist
Procedural ship layouts and loot drops
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
7 Wonders of the Ancient World
Planning cascades and clears to meet goals is core
SteamWorld Heist
Crew builds, weapon picks, and turn routing carry runs
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.