Hello Cherie,
Thanks for reaching out to us with your question.
At the moment it is not possible out of the box to have different looks for the different tickets within one event.
There is a possibility so set up a header image for the tickets, but all the tickets of the same event will have the same looks.
Potentially, with some custom coding and a template override you could create different looks for the different tickets.
You would need to create a template override for this file:
wp-content/plugins/event-tickets/src/views/tickets/email.php
You can read more about template overrides in our Themer’s Guide: https://theeventscalendar.com/knowledgebase/themers-guide/
Let me know if that helps.
Cheers,
Andras