difference between student and regular edition

Hello everyone, I plan to order a SUSE professional 9.3. There are three different packages. 9.3 Strong Encryption (128+ bit) 9.3 Update Strong Encryption (128+ bit) 9.3 Student Version Strong Encryption (128+ bit) My understanding of "update" version is an upgrade version based on previous suse installation. What is the difference between regular&student version? My may use suse on our desktop and server. Do I have to order professional and server edition separately? thanks for any input! carl