I'm guessing I'd go for the regular unless I see a very distinct 'must have' feature with the curved edges. From the tease renders, though, it doesn't seem like the edges are as wide as the Note Edge, so don't know if they'll even provide any extra functionality at all.
And just like with the Note Edge, I'm worried about how durable these new curved glass edges of the phone are, as well as how slippery.
Oh, and that's IF I get one haha. Very happy with the Note 4 currently, and since I'm a bit of an S-Pen junkie...