I am a little confused

Novell offers both Novell Open Enterprise Server 11 and SUSE Linux Enterprise Server 11, does it matter which one GroupWise 2012 runs on? Is it better to put GroupWise on it's own server (virtual) and have the file server be separate?

I have a new box that I am going to virtualize and just took 3115 and 3116 for SUSE Linux intro and admin, now I am wondering if I shouldn't have taken a class on Novell Open Enterprise Server 11 instead.

Any suggestions or advice is appreciated!