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
A classic maze-building tower defense won almost entirely through optimal layouts.

Optimization · Pure Optimization
The beloved theme park builder where you design coasters and manage every detail of a growing park.
Defense Grid 2 leans Optimization (Pure Optimization); RollerCoaster Tycoon leans Optimization (Pure Optimization).
Defense Grid 2 leans a little harder on execution, though the gap is small.
Defense Grid 2
Occasional orbital-ability timing, otherwise hands-off
RollerCoaster Tycoon
Mouse-driven building with no time pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Defense Grid 2
Fixed alien wave scripts, nothing adapts
RollerCoaster Tycoon
Guests are simple, fully mappable simulations
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Defense Grid 2
Spawn schedules are deterministic and previewable
RollerCoaster Tycoon
Guest spawns and breakdowns barely matter
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Defense Grid 2
Maze routing and tower economy are a solvable puzzle
RollerCoaster Tycoon
Park layout, pricing, and coaster stats are solvable systems
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.