If I didn't have an S7E right now and will be buying a phone I'd still go S7E.
1. Coming from a Note, I hardly ever used the SPen. So paying for that again is a useless expense.
2. The S7E will have a price decrease a week or 2 after the Note 7 officially launches, to move stocks. So the price difference will increase to more than just 50 bucks. Probably closer to 100 bucks or even more. So it's going to be more bang for buck.
3. The Note 7 will eat more battery, otherwise you won't be using a number of the new features. The feature for the AOD notes itself would be an extra battery use. The bigger screen as well. The digitizer also is more power hungry due to it having smaller proprietary touch points to accomodate the S Pen. I'd expect it's battery life to be closer to that of the S7, than the Edge, in real life usage with all features turned on.
4. Most of the software features will be introduced to the S7E anyway with a major update. Probably along with Android N. It's been a historical thing, that the S series also get the Note software eventually, except for hardware specific things. The best most visible example probably was that the S3 did not get released with multiwindow, but got it after the Note 2 launched with the feature.
Basically, the Note 7 doesn't have anything to offer me that I find interestjng that I won't get from getting the cheaper S7. The bigger screen and S Pen aren't that attractive to me on a phone.