jonl711 on "Installed new version on new server, need to bring old to new."

Hi all,
I had to build a new web server (old one h/w died on me) which I did with the latest version of WP.
However the version on the older server is the version prior to this new one.
I'm not sure if I can just take the older version and copy over the top.
Is there a method to putting the older version on this new one or should I re-install the previous version and then upgrade to the latest?
Also will there be any issues with the php, apache2, and MySQL. I believe these are all the same version.