In "httpd.conf" file. For example:
By the way, if you use the same version of second Apache as the first, you no need to copy executable file to another location, just use the same, but point it to use another configuration file specfying option "-f /etc/apache2_new/new_config_file.conf".
Also which checking httpd -V from both the location it shows same parameter.
You probably did not specified new configuration option, like I wrote ealier.