This review mentions nothing about Alien Legacy.

http://www.dvdtalk.com/reviews/read.php?ID=8334

This etailer has Alien Legacy listed on disk 9

https://www.cnl.com/describe.html?Hi...60F&item=32270

And...Amazon.ca has two versions at different $$$

http://www.amazon.ca/exec/obidos/ASI...869202-7610762

http://www.amazon.ca/exec/obidos/ASI...869202-7610762

Doubt theres any difference. Amazon.com also lists Alien Legacy in the Disc 9 supplements too (maybe just a mistake?)

Actually, it does.

Here's what I wrote in the review: "The supplements from the Alien Legacy set aren’t carried forward into this set. That means you’ll be missing some cool features—notably a fantastic audio commentary over Alien by Ridley Scott. You also don’t get that original disc’s isolated audio tracks. Also, although fans hoped that the contents of the limited-run Alien Legacy Bonus Disc might be ported here, such is not the case. Finally, the recently released Alien Saga DVD remains a completely independent release that you’ll have to purchase separately."

It ain't on there. Unless it's an easter egg. Which I doubt.

check [here]

The Canadian version has a French (Dolby Digital 2.0 surround) track, while the U.S. one is in Spanish (Dolby Digital 2.0 surround)

That's the only difference!