Setting up a section of a wordpress page?

Question

MySQL

Landing page integration in WordPress.
What is the best way to organize the settings of sections (screens) of the page in the admin panel:

Or through setting the theme --> appearance:

Which of the two options is the most common, convenient for the developer and the customer?
Or even some third option?

Answer 1

SELECT
    messages.*
FROM
    messages
WHERE
    messages.dialog_id = 3
AND
    messages.id NOT IN (
        SELECT deletes.message_id FROM deletes WHERE deletes.login = 'vasya'
    )

Answer 2

Or even some third option?

There is also an option using the Advanced Custom Fields plugin and the like.