I wouldn't recommend either one. Neither the Champion or the Omega 9000 will juice greens. Of the two, I'd say the Champion is best because the pulp ejects through the nose. With the Omega 9000, centrifugal, the pulp collects in the juicer and has to be cleaned out after juicing a small amount.
The best 'all purpose' juicer is the Omega 8003, single-gear.
I own an Omega 8003, an Omega 4000, a Wheateena Green Label, and a Vita-Prep 3 (blender), and use them all.
Good Luck with your search......WY