Ok, I have a few that are different right off:

tpl_product_info_display.php
tpl_modules_category_row.php

from the includes/templates/template_default/templates folder

and

product_listing.php

from the includes/modules folder.

I'm going to do a side by side comparison, but I have a question:

are these files able to be copied into the server directly from a freshly unzipped copy of zencart? to make sure everything is the same?