The Fusion is a HandiQuilter product, and the Jewel is a Babylock product. HQ actually produced the Jewel. HQ has 2 new models, the Fusion and the Avante. Both are awesome machines. The only thing I know about the Babylock is that there is some question regarding the frame, which is not made by HQ. I would recommend finding a Yahoo Group for the Jewel and also joining that. It's very informative to join the Yahoo Groups...you can learn all the details about any machine, good and bad. This is what I did before purchasing mine, and I knew exactly what I was getting, and how much to pay for it :)
Good luck! Now is a great time to buy - especially if you consider used...there are awesome deals out there.