What is the difference between QuarkXPress passport 6 and QuarkXPress Passport

Question:

and is that possible to make QuarkXpress 7 brojects work under QuarkXpress 6 ? is that any way to make it open without a problem?

Best Answer - Chosen by Asker:

i'm still looking for the differences. seems like same old quark to me. im pretty sure that everything is backwards and forwards compatible/