Is there any reason why using the same wp-config file might not work in MAMP?

You will need a different database for each site, or at least a different database prefix. In either case, you’re wp-config.php file will be different for each site. I don’t see how that copying that file verbatum will work.

Based on this comment:

Update the config file to be exactly like the current version that i
have on MAMP (Site1) and when i go to that site i’m able to get onto
the correct first page but then when i go into other pages i re-direct
to the Site1 interior pages

I am guessing that you have WP_SITEURL or WP_HOME defined in that wp-config.php file. That is why you are getting the strange redirect.

Alternately, if you are trying to share a database or use two sites with the same prefix, the value in the database is going to cause trouble. It can only be set to one site or the other.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)