While reading Programming Phoenix LiveView, I came across a section (Model Change with Schemaless Changesets - Chapter 5) which goes through setting up schemaless changesets for forms that you do not have a database table for.

I am very familiar with this method (I do it all the time), however instead of creating a Schemaless Changeset, I usually opt to just make an Embedded Schema. To me it seems simpler/cleaner to be able to define the struct and the type at the same time instead of maintaining two things (defstruct and types).

Schemaless

defmodule MyApp.Accounts.User do
  defstruct [:first_name, :email]
  @types %{first_name: :string, email: :string}
end

Embedded

defmodule MyApp.Accounts.User do
  @primary_key false  
  embedded_schema do
    field :first_name, :string
    field :email, :string
  end
end

Question:

Are there any reasons to choose schemaless changesets over embedded schemas?