Personally, I use DaVinci Resolve, but the results are largely the same, with exports being largely entirely CPU dependent: https://www.pugetsystems.com/labs/articles/DaVinci-Resolve-1...

Looks like Puget Systems does a lot of performance shootouts, including some Premiere ones: https://www.pugetsystems.com/all_articles.php

Philip Bloom recently did a writeup of his switch from a Mac to a PC for his editing machine (yes, it's definitely a trend, unless you are a FCP diehard or doing audio production, the Mac is sadly done as a content production platform): http://philipbloom.net/blog/makingtheswitch/

Will be interesting if they revisit some of the shootouts post-meltdown/spectre patching...