The Pixel 2 XL looks good - the one made by LG. It is based on the LG G6 and V30 phones. Both are great phones minus some imperfections like the cameras and local limitations (some regions got wireless charging, some got higher quality audio, some didn't etc.).
The regular Pixel 2 will be super old school and is made by HTC. Nothing to see there.
If I was looking for a phablet I'd be in heaven right now - between the Note 8, LG V30 and Pixel 2 XL that's a tough one as they're all nothing but the best phones around.
Apple mobile chips are not the best with efficiency. They are the best for performance, period. But iPhone 8 has a massive chipset that contains 4 huge cores, much bigger than anything ARM, Samsung or Qualcomm make. You can see that in performance benchmarks. The multicore performance is almost double that of the Snapdragon 835. All of those chips are made on pretty much the same process, so that performance ain't free. Apple's philosophy in chip design took a weird turn after the iPhone 5s and 6 when Apple's chips were all around the best AND most efficient, thanks to Jim Keller who designed them before he left for AMD to design Ryzen.
The dual core Apple chips of the iPhone 6 era were a masterpiece. Now they are just the fastest, all else be damned. They make more sense in a tablet.
Otherwise the battery behavior makes sense - iOS is more power efficient due to how it freezes background processes, while Samsung phones are over engineered to the T as far as efficiency goes, with their weak spot being Android's poor standby battery optimization. Samsung's display engineering is particularly the most efficient in the field.
The slightly bigger battery helps too.
Speaking of, either I've been hit by Apple's planned obsolescence after all, or iOS 11 is a battery hog. I used to charge my iPad Air like clockwork - once a week. Now with exactly the same usage I have to charge it every second day. I wish I knew, as the only other change I'm noticing is the minor but inconvenient icon rearrangement to better suit the iPhone X, and the fact that control center doesn't disable wifi and bluetooth when I tell it to