Hopefully someone will buy one of each and do a side by side comparison. I'm guessing that there will be more of a difference in durability as opposed to a difference in initial quality. Personally, I'm more interested in the fact that they are comparable enough to the originals, that they won't look different sitting next to each other on a shelf. Overall durability isn't as important to me because I've never had a problem with jewel cases breaking when they are in my possession. I only have the problem of trying to find cases that aren't broken before I get my hands on them.
With that being said, at $4 to $5 each, I'm probably going to stick with DVD cases anyway.