head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Physics sandbox about engineering medieval siege machines that usually explode beautifully.

Optimization · Pure Optimization
Charming diorama puzzler about routing a jumpless Toad to each star.
Besiege leans Optimization (Pure Optimization); Captain Toad: Treasure Tracker 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.
Besiege
Piloting wobbly contraptions takes some hand skill
Captain Toad: Treasure Tracker
Gentle navigation, no jumping, light timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Besiege
Static castles and scripted defenders
Captain Toad: Treasure Tracker
No adaptive opposition anywhere
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Besiege
Deterministic physics and fixed objectives
Captain Toad: Treasure Tracker
Everything is visible and fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Besiege
Machine engineering is the whole game
Captain Toad: Treasure Tracker
Rotating dioramas to solve fixed route puzzles
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.