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 minimalist puzzle platformer about deducing box-chain solutions.

Optimization · Pure Optimization
A factory-engineering sandbox about scaling throughput against your own bottlenecks.
BoxBoxBoy! leans Optimization (Pure Optimization); Factorio 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.
BoxBoxBoy!
Box creation and movement need no precision
Factorio
Some APM in early hand-crafting; otherwise irrelevant.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
BoxBoxBoy!
Solo puzzle game with no opponent
Factorio
Biters follow fixed pollution rules; no adaptive opponent.
Factorio leans a little harder on variance, though the gap is small.
BoxBoxBoy!
Puzzles fully deterministic, nothing random
Factorio
Resource patch placement adds minor map randomness.
Factorio leans a little harder on optimization, though the gap is small.
BoxBoxBoy!
Deducing box-chain shapes to clear obstacles is the game
Factorio
Throughput, ratios, and logistics are the entire game.
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.