Unfortunately, it sounds like AMD's Hondo is well behind Intel's Clover Trail in the battery life department. (theverge.com)
The S9 has a larger battery (3,000 mAh vs 2,700 mAh), but then it does have a bigger, higher resolution display to power, so again it's pretty much even in the battery life department. (t3.com)
One thing is for sure though, the Mate 10 and Mate 10 Pro should be able to trump pretty much all other flagship smartphones in the battery life department. (android.gs)