Difference between these two joining table approaches?

Question

Consider we have two tables, Users and Posts. user_id is the foreign key in Posts table and is primary key in Users

Answer 1

where post.user_id = user.user_id

Here you are making a conditional statement

from users as user join posts as post using user_id

Here you are joining two tables using the foreign key

At the end is just the same but JOIN is better used for more advanced queries...