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

Optimization · Pure Optimization
Renovation sim about cleaning and flipping houses.
Besiege leans Optimization (Pure Optimization); House Flipper leans Optimization (Pure Optimization).
Besiege leans a little harder on execution, though the gap is small.
Besiege
Piloting wobbly contraptions takes some hand skill
House Flipper
Click-and-drag cleaning and placement
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
House Flipper
No adaptive opponents
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
House Flipper
Light job variety
Besiege leans a little harder on optimization, though the gap is small.
Besiege
Machine engineering is the whole game
House Flipper
Renovation routing, budget, profit margins
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.