I want one myself, probably the 0560. There is a difference in blade length and that might be important to some people but the deciding factor for me is the look of the knife on the lock side. The 550 by comparison is crude, it looks like someone has take off the scale and you are looking at the inside of the knife. The 560 has more of a finished look. I still get hung up on the fact that one side of the knife has a nice scale but the other side is just the exposed crude frame. Knives like the Sebenza look pretty much the same on both sides, the 560 is more finished on both sides but again both sides look almost the same. On the 550 the 2 sides look very different.