I am the one that got the other way around and choose the Sapphire Pulse. I undervolt the cards with Hynix Memory and Bios mod them. MSI Afterburner settings are :

GPU CORE CLOCK: 1150
GPU MEMORY CLOCK: 2175

Hashrate for a card is 30.5 Mhash and I doubt the Nitro+ can go much higher than this, max I have seen is 31 Mhash. I have gonne with Sapphire Pulse because the power consumption is just a bit lower and in mining every little bit helps, running 95 watt while mining monero or 110 watt while mining ethereum only and 145 watt in dual mine.

Still the Nitro+ is considered to be the best version of the Sapphire cards.