I'll attempt to answer the OP's quesiton.
Edge Pro Inc. has said they ask people if you intend to sharpen knives professionally, 8 hrs. per day. If so, get the Professional model. If not, get the Apex. I would recommend the combination that includes the 120, 220, 320 or 400, and 1000. If you go with the Apex kit 1, you'll need the other stones soon and pay more to get them.
As far as the "clones" or "fakes," I have one and it's not nearly as good as the real thing. The fake has a lot of movement in the upright where it connects to the base and in the arm. It can produce sharp edges, but isn't great.
As far as the KME, Wicked Edge, or Lansky, those are another question (and another thread).
Hope it helps.