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
Charming diorama puzzler about routing a jumpless Toad to each star.

Optimization · Pure Optimization
A classic maze-building tower defense won almost entirely through optimal layouts.
Captain Toad: Treasure Tracker leans Optimization (Pure Optimization); Defense Grid 2 leans Optimization (Pure Optimization).
Captain Toad: Treasure Tracker leans a little harder on execution, though the gap is small.
Captain Toad: Treasure Tracker
Gentle navigation, no jumping, light timing
Defense Grid 2
Occasional orbital-ability timing, otherwise hands-off
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Captain Toad: Treasure Tracker
No adaptive opposition anywhere
Defense Grid 2
Fixed alien wave scripts, nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Captain Toad: Treasure Tracker
Everything is visible and fixed
Defense Grid 2
Spawn schedules are deterministic and previewable
Defense Grid 2 leans a little harder on optimization, though the gap is small.
Captain Toad: Treasure Tracker
Rotating dioramas to solve fixed route puzzles
Defense Grid 2
Maze routing and tower economy are a solvable puzzle
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.