It's like Steemit as much as Steemit is like Medium - they are all publishing platforms. The main differences are:

• Publish0x doesn't have it's own token or blockchain - it gives out many different tokens (right now: BAT, DAI StableCoin, HYDRO).
• Publish0x also pays out tokens to readers, and it does not matter which articles readers choose to tip... the reader can always keep a % of the tip, which is the same no matter how well the article does on the platform, so there's no "curation" element to it, or the "hunting whales" element either.