The biggest difference between the three models is the feed chute where ingredients are inserted. The B6000 and C7000 models have a 3-inch wide feed chute with a small “fin” protruding from the middle of the chute for safety. So, when inserting an apple into the B6000 or C7000, a pusher (included) is needed to glide the apple through the safety fin into the juicing screw. The EVO820, however, has a 3.2-inch flip gate feed chute. The flip gate drops ingredients into the chute, eliminating the need for a safety fin. This way, you can simply drop an apple down the feed chute without using a pusher. The flip gate can also lock into place, providing a more narrow guide for inserting leafy greens. Overall, EVO820 has the newest parts and motor design. It also comes with a smoothie strainer and sorbet maker, whereas the B6000 and C7000 only come with a sorbet maker.