Hello all people with knowledge.. 

I have got a BeoCenter 2 - which I really like alot - the design is great. I also have a Mac Mini that will be used as a mediacenter/music central. 

Today I have it connected to the a.aux - it works fine. But I want to use the N.radio and N.music function aswell and just use the Beo4. Instead as today, when Im using the Beo remote for volume and my Ipad/phone to change tracks. 
I have been reading and I know I need the Beoport Pc adapter between and some software to get this to work out fine.

No to my question, can I use the old one or shall I use the latest of the Beoports? Is there a difference between them? My BeO delaer has and old one I can buy if I dont want to buy a new one. Is there a difference between them? 

Which shall I buy old or new?