So I have been sitting on this fence also... I have been wanting a Note since the # was released, but for various reasons, kept putting it off. When the 4.4.2 update nerf'ed the radio in my old GS3, I got pretty irritated with Samsung and the locked bootloaders. My GS3 was the first phone for me with a locked bootloader, and I had convensed myself that I didn't really need to root / ROM anymore, until the radio broke. Unlocked bootloader = easy fix. Locked bootloader = nearly useless phone.
Enter the Nexus. Unlocked bootloader, YEA! Phablet form, YEA! Front speakers, Woot! Few missing features, ok, I can live with it. Verizon information blackout = GRRrrr. No, I am not going to buy from GPS and pay $700. Yes, I am spoiled by 'free' phones.
So back around Nex6 launch time, I give myself to the end of the year to make a decision, and get a phone. Saturday, I go into my local VZW store and ask them about the 15 day return policy. Turns out, Christmas special, the return policy is extended to Jan 15 for all phone. So now I am thinking, if I keep chasing rumors and wait for the Nexus till mid January, and still have no phone, I will be feeling like Charly Brown trying to kick the football. Done deal, I left with a Note 4. If VZW announces the will sell the Nex6 on Edge between now and 1/15/15, I will have to re-evaluate the decision, but for now, I am really liking the Note 4. Fast, snappy, BIG! Battery life is excellent - I had a zero-lemon 7000ma battery in my GS3, so I am not in the habit of docking my phone on chargers, and I use it a lot. so far, I have not killed the battery in one day. Closest I got was Saturday, playing a lot of games, I got the battery to 10% with about 5 hours of screen on time.
Comparing to a coworkers Nex6, both phones in 'slim' cases (His, Spigen, mine Tech21) the Nexus was obviously bigger. As others noted, if you line the button bars up, and look only at usable screen size, the Note 4 is bit taller, the Nex6 at bit wider. Splitting hairs, though, they are really close in usable screen size. Screen quality - again very close, can't really tell from a few minutes in office lighting. Sound - Again, we are in an office, so did not "jam" the phones, but as antidote evidence, he is a DJ, and thinks the speakers on his Nex6 are excellent, my Note4 gets loud, but sounds tinny.
For now, I am satisfied with my N4, comparing stock devices. However, I will be watching for VZW N4 root. I really don't want another dead device due to a bone-headed Samsung update. If the Nex6 drops for VZW edge, I will have some more thinking to do...