Difference between flavors of DVP 642

I noticed different flavors for DVP 642 (17 vs. 30). I also noticed few versions of 630 player.
1. What are differences between DVP-642/17 and DVP-642/30.
2. If I want to find a match for DVP-642/30 but European edition, what would be the flavor?

Thanks!

 

I sort of found the half answer myself:
http://forums.afterdawn.com/thread_view.cfm/170960

p.s. I made one mistake, I was interested in difference between 642/17 and 642/37 and not not 642/30 like I posted in my previous message