Correct me if I am wrong but I think the DVD on the left is the American DVD and the DVD on the right is the Canadian one. I think the one on the left is sold in both the USA and Canada but I don't know about the one on the right.
I got the DVD (to the left) on Ebay and the other one I bought at Zellers today.
American/? DVD:
13 Episodes
2 Disks
English Language Only
Special Features
Red Harrier Card
Canadian/? DVD:
5 Episodes (Because its volume 1)
1 Disk
No Special Features
English and French Language
Red Harrier Card
Obviously the DVD to the left is the better one because you are getting more episodes.. but if you speak French buy the one on the right! The menu for the DVD on the right is a little strange because it looks as if the episodes for the 'episode index' are in the wrong order. I think this is because in the French version of the show the episodes are in a different order... which doesn't really matter because there isn't really a continuing element in the show. (To the beginning at least) Also I have seen various websites that suggest that 'The Guardian Of The Souls' was originally the 2nd episode.. but again.. it doesn't necessarily matter.
It is really interesting to hear the voices in French though.