I was looking for Nitro models, but at the beginning of this year there were non in here, and I could only find the Strix of all the customs. Took another 2 months to find another, eh. Everything worked fine before, while I was mining on either NiceHash, ETN with cryptonight, and even XMR on Cryptonote. Even while I still had Ryzen system and GPUs were so close to each other, and the upper card had at least 10 degrees more than the lower GPU. Not sure what's happening lately. I'm also experiencing BSODs, with thread stuck in device driver, or video memory management internal. But again, so random. The last one was after nearly 24hrs of non-stop mining. Sometimes it takes a couple of hours, sometimes minutes
Oh, well.
I have 6 x Vega64 Asus Strix, also I have 1 Nitro Vega 64, there is not difference, maybe ASUS has 3 years warranty and Nitro 2. So I prefer ASUS

I have also a lot of reference model from Sapphire Vega64. All are the same for me, I use the same recipe: Win 10 installed (usually latest version so no need to update), install AMD drivers, install AB, apply PPT, disable ULPS and Crossfire from regedit -> all are hashing with ~1900 h/s 24/7 no matter the vendor.