The only thing you will learn from owning a knock-off of a Sebenza, is what it's like to own a knock-off of a Sebenza. The knock-off won't tell you ANYTHING about what it's like to own the real thing. There's no way a cheap knock-off of a $450 knife is going to come close to the real thing.Knock off's don't really bother me, I think they end up being advertisement for the real thing. Just like how the Fender Stratocaster is the most copied guitar in the world but people who play the copies generally end up getting a real one eventually. I know, it happened to me. And after handling a knock of Seb for a couple months I might decided to go buy the real thing but I do know that I would not buy one with out handling some one else's or a knock off for a while to get the feel of it.
Of course you might find yourself so disappointed with the knock-off and so craving of high-quality as a result, that you will feel compelled to buy a real one. But I wouldn't suggest going the knock-off route.