As an ENFP who grew up with an ENFJ...
Way different.
Ne is all possibilities, doesn't like to settle on just one, experiences a great deal of continual self-doubt over intuitive conclusions (I think this is what's going on, but maybe I'm wrong, so I'll belay judgment for awhile). Very, very good at changing tactics easily or turning an entire prearranged plan upside down and winging it with a moment's notice.
Ni is futuristic focused, and often very sure of their futuristic assertions after a certain point (my ENFJ dad has accurately predicted both the last two major election outcomes and the inevitable fall out of both, and never wavered from those assertions). They are not good at changing mid-stream. They find Ne-dom's "indecisiveness" frustrating. They don't want to act until they have sorted out things in their mind. And, they're far more confident in expressing intuitive insights into people (which are sometimes scarily accurate).
IE:
ENFJ: Your friend ____ is escaping her physical problems and insecurities about her environment through irrational dreams.
ENFP: You can't know that for sure.
*two weeks later, sees ample proof that he was indeed right... and he somehow figured it out with almost zero physical evidence*