I have the N7 and the Pixel XL as well.
- The Pixel is definitely faster, definitely smoother. It's noticeable.
- I miss the home button. I dislike on screen buttons.
- The Pixel camera seems pretty darn great. I don't think low light photos are that different, except for EXTREMELY low light ones. And for those, the N7 lights it up more, but is more grainy for me. And for those really rare instances, I would probably just flip the flash on anyway. The Front Camera seems better to me on the Pixel, the rear cameras are very, very close. I haven't taken enough pics to really tell yet. The fact that the cameras are so close in quality to me is, in itself, a testament to just how good a job Google did with the Pixel camera - because the N7 camera was the best I have ever seen.
- The rear fingerprint sensor on the back works well, is quick and it's consistent. but, being that is is on the back, for me it is sometimes a pain (laying on the desk, etc). But again, it is fast, and it turns the screen on and unlocks with one touch, quickly. Having the ability to pull down the notification shade using a fingerprint sensor swipe is nice too.
- Somehow, amazingly, the Quick Toggles at the top of the Pixel are missing a "Sound" toggle. They finally added the Samsung-like quick toggles (and there are 6 showing at once), and they are customizable. But somehow there is no toggle for "Sound" (Sound, Vibrate, "Silent). Silly little thing, but something I used ALL THE TIME on the N7, and just an astonishing , silly omission. Google is great, but sometimes they leave out the easiest things. You have to actually lower the volume all the way down with the volume button to get it to Vibrate. Welcome to 2010 I guess? :-/
- Nouget 7.1 is great. The whole UI is smooth and buttery on the Pixel XL, and the app shortcuts (3d touch stuff) in 7.1 are super handy. It is IMO excellent software that now seems less boring than it used to be years ago. I still prefer much about Touchwiz, but "stock" has come a long way. The nice bright colors everywhere spruce up the feeling as well. It's really a joy to use. Fast, fast, fast. Opening apps, scrolling, multi-tasking - all of it is just about instant. Kudos to Google for this.
- I love using the Assistant. It has some ways to go yet, but it's pretty great. I use it WAY more than I ever used Google Now.
- I miss the Wireless Charging big time from the N7
- The battery is definitely not worse than the N7, and almost assuredly better for my use. Very happy in this regard so far.
- I like the look and feel of the Pixel. I prefer the N7 looks overall, but the Pixel look and feel is nice IMO. I definitely don't feel like I am gonna drop the Pixel, like I did with the N7.
- No issues with radios. GPS, Bluetooth, Wifi, and LTE all seem great so far, but it is early days.
- The screen on the Pixel is very nice. It's my first non-Galaxy screen in about 3 or 4 years, so I was tentative. I agree with the OP that it is just a notch below the N7. It's still really nice though, but nothing - and I mean nothing - beats the Galaxy screens IMO. It's preference of course, but for me Samsung is the king of display technology.
- Split screen works great. It doesn't support all apps yet, but many. And so many more will come soon - unlike on Samsung where there seems to be limited , static amount that support split screen.
Everyone's experience will differ. For me, I see pros and cons. Overall I am happy after 7 days. Just the sheer speed and snappiness might just make me forget some of the great things I will miss from my N7..