The notable differences are in how we use our extraverted functions.
You are waaaaay more inventive. My Ne needs an input before getting to work. (This is for myself, but I'm prone to looping).
Both the ENTP I know irl are a volcano of ideas. The first is capable of building a cricket by using the wires of a mini torchlight during philosophy lessons. He just saw the torchlight and then the cricket. He just did it. (He didn't have any idea about how to work with wires and such fyi)
I'm not that good at creating from zero as I use Ti to guide me. So I use Ne more in a trouble shooting, practical way. "This thing doesn't work. I analyzed everything from all the possible perspectives. There are x possible motives, related to other 20. I could try this weird approach. This or that. This could lead to Q, W, or E. I don't feel like trying the trusted-and-reliable, maybe this will work either and be quicker or more pleasant"
Of course I still have those Ne moments (such as when I tried to repair a mouse with a toothstick, you read that story), but are less prominent then how they appear in ENTPs.
Then, the big difference. The use of Fe. I can't remember a single moment in my life, even as a child, not living the Ti-Fe conflict. Inferior Fe is what should help me link with other girls but fails because hasn't been used enough. It is a destructive force that dismesses my plans because "think of other people. What will they think of you?". After being at war with her I think I have trained her to at least give basic empathy to others, but it's still hard. It's the desire that the INTP finds most difficult to accomplish.
On the other hand, you ENTP use it as easily as we use our Si. You, Brain, successfully established bond and sense of community in a forum. The ENTP I was speaking about before is really good with words and knows how to trick people. The other ENTP keeps up my group of friends (INTP, ESFJ, ESTJ). He doesn't take everyone's need, but contributes in generating harmony. My Fe wants harmony, but doesn't know how to get it. Your Fe works better at it.
(I'm starting to fall asleep, if I miss something I'll add it tomorrow morning)