Well, technically that is your opinion, not a fact. On paper, the Pixel XL screen wins on specs alone:
Google Pixel XL: 5.5in 2560x1440, 534ppi
iPhone 7 Plus: 5.5in 1920x1080 at 401ppi
Some people prefer AMOLED, some the LED backlit of the iPhone 7. Both are great.
Both camera's are excellent, and won't disappoint.
IMO, the choice comes down to OS and integration. Personally, I prefer Android, and all of the new features Google is offering with this new phone. Unlimited full-res storage, Google Assistant, and all the other google apps.
Coming from a Note 3, you will likely acclimate to the Pixel XL faster than you would the iPhone.