| Cap. Darling |
The lattice allow a arcanist to cast the Spell like if he had prepared it. The page does not.
And you need to hold the Lattice in the hand the page just need to be on your person.
There are no need to decide if it is a arcane or divine thing on the Lattice. And the lattice can be copyed to a Spell book at the cost of it.
So main difference is for Arcanists.