Whereas the Omega J8004 is a commercial-quality machine, the Omega NC800 is designed for household use. When it came to green juice, the output was almost identical. The carrot juice was a different story, though. The NC800 yielded only 12.3 ounces. John Kohler at DiscountJuicers.com said that this machine put out 15 percent more juice than its predecessor, but we found that it actually put out 25 percent less carrot juice than the J8004. The nice feature of this juicer is that it boasts a larger feed tube than its predecessor, which makes prep a little easier.