The Nenox has a completely different shape than your Wustie - it's got a pretty long flat spot in front of the heel and the tip is much lower to the board. Things that most folks around here desire. The Wustie has a lot of curve in the edge from heel to tip and the tip is nearly level to the spine making it much higher off the board. Things that most folks around here despise. There's nothing in common between the two.
Nenox does make some sexy looking blades and handles. They show up on a lot of cooking shows and Iron Chef episodes. They may have some sort of sponsorship deal, just speculating...
Misono went through a big price hike a couple years ago, and now they are generally considered over priced for what they are. I don't recall anyone ever saying they really loved the UX10 - a few folks even said it was all that. Misono's Swedish Carbon, however is highly regarded as a very good value and has good blade shape.
Going from a typical western knife to a high end Japanese knife will have a learning curve. Your gonna pick up your new knife and start doing something that is second nature to you w/ you Wustie and suddenly realize it's doesn't feel and act quite the same. But once you get used to it, you'll never go back.