The biggest similarity between literary writing and advertising copy is how your things can be favored by others. If you let others read the first sentence, keep reading. I didn't arrive completely halfway. But keep asking what happened next.
What is said above is rather empty. You can explain it slowly if you have time.
Now let's talk about the difference: advertising copy focuses on the essence of marketing. Literary creation focuses on the expression of content and ideas.
There are differences and similarities in essence. Similarity means that everyone wants to achieve a certain goal and is setting a "trap" for it. The difference is that advertising copy is to serve enterprises, not to sell products. Literary creation sells your ideas.
There are actually many skills about copywriting. There are many intersections with literary creation. Read more and write more, and you will.