Difference in behavior between a Field and an Attribute when used directly in a class

[PedroH183]

Below, I show a simple example. The generated SQL has a difference in the "" around the field, but in the docs it is showed as equivalent.

What is the proper use case for these features ?

from pypika import Table, Query, Field, Parameter

shops = Table("shops")

first_query = Query.from_(shops).select(
    Field(shops.id, 'identification')
).where(
    shops.id == Parameter("%(shop_id)s")
)
# SELECT ""id"" "identification" FROM "shops" WHERE "id"=%(shop_id)s

second_query = Query.from_(shops).select(
    shops.id.as_('identification')
).where(
    shops.id == Parameter("%(shop_id)s")
)
# SELECT "id" "identification" FROM "shops" WHERE "id"='%(shop_id)s'

assert first_query == second_query
print(first_query, second_query)