PhoneArena made comparison between battery liveliness in two versions of Galaxy S7: with Snapdragon (mostly USA market) and Exynos (rest of the world) and I must admit that second variant is so much more effective!
Exynos have gigantic advantage in energy efficiency without losing power. And it’s not end: Snapdragon version have worst results from four tested models!
Summarizing: version dominating on american market for previous generations will be much worse then Exynos edition, USA recives less love this time.
I want to remind you that Note 7 will probably have same situation. So don’t buy Snapdragon versions.

Source: phonearena