Battery life is so subjective the only relative use is your own. I have 300 apps installed and battery life is significantly better than my two Note 7s that I thought were great too. The wild thing is I mainly used the Note 7 in standard power save mode unless gaming. I have yet to use power save more with the 8+ and it is STILL better. About 90 minutes more SOT for my use. That IMO is nuts good.
Butter on the biscuit being the 8+ is much faster with much better thermals than the Note 7. Ditto comparing the Pixel with 821 SOC.