Difference between Rest API security protection and API Security ASM template ?

Hi,

I have to protect some Rest API with ASM.

I saw that there are 2 different API protection features :

1) Create an ASM policy with the API security template where you just import the swagger file.

2) Use the guided configuration tool and create an API security protection. I can see that this also add some APM features to manage authentication

What is the difference between the 2 ?

I do not need to manage authentication at F5 level,  which one should I use ?