The devils in servers are in the details! Am sure it's a typo ... no such thing as a 65bit - there's a 64bit though! ;)
Here's some 'light reading' for ya:
https://www.digitalocean.com/community/tutorials/apache-vs-nginx-practical-considerations
and another
http://www.hostingadvice.com/how-to/nginx-vs-apache/
Everyone's experience might vary! ;)
'spirit of sharing', Ken