I'm going for it. Only because I got the BOGO deal for my S7E and sold the first one I got. I gave my current edge to my brother for $200 so I'm pretty much covered on the cost for the Note 7 anyways, cruising on an S5 until the phone is released. I'm honestly just interested in it for the IRIS scanner, and the S-Pen and Type-C port. Basically niche features that I enjoy experiencing. So yeah, it's not costing me anything out of pocket but if I were you, I probably would keep the S7E for now until the Note 8 comes out because they are literally the same spec phones as for internals.
I don't think I can call the S7E and N7 identical. Sure, they have the same CPU and RAM, but otherwise things have changed quite a bit.
The screen is better - much better. This is arguably the most important component for user experience, and it's the best display in any smartphone ever released. Part of this is because of the dual ambient light sensor, meaning automatic brightness will be more accurate to your actual lighting conditions. In every other aspect it's also a world-beating display. Read
DisplayMate's review if you're unfamiliar.
The aluminum and glass used are better, which give it a more rigid, more premium in-hand feel. They also changed the geometry of the edges so there's less of a curve, and the back has a wonderful shape unlike the S7E.
The S7/S7E root experience is terrible, since it's a very non-optimized engineering boot. Battery life suffers, stuttering abounds... just generally not worth doing, IMO. The Note 7 is likely to suffer from this same flaw, which makes the new Grace UX particularly notable.
USB-C and USB 3.1 are also huge improvements. USB-C is what every flagship will have a year from now - it's already what most flagships have. It's more futureproof, more convenient, and better at transmitting both power and data. USB 3.1 is of course much faster for data transference.
4x4 MIMO is a pretty big benefit for the future, but currently not of much use to most people. 256QAM is in the same boat: neat a year or two from now, but not so useful right now.
In my opinion, the CPU and RAM, unless severely lacking (which the N7 is definitely not) are not the biggest reason to purchase one phone over another. This has been true in the past, but right now mobile processors are so powerful and RAM is so abundant that the focus should go to other aspects.