I had the s8+ and currently have the essential. While I can't speak for Verizon compatibility. I can say that the essential phone out does the s8 on everything but camera. Better battery life, apps open faster and run smoother. 128gb of storage is awesome, the finger print scanner is in the right spot lol. Zero bloatware, which is amazing. Samsung packs the s8 full of **** you can't delete ever, the only apps you can't delete on the essential are the core google apps.
You will get Oreo on essential before the s8, you will get every update faster on the essential phone. I'm really looking forward to the modular aspect of this phone.