I have just stumbled on a YT video (from Manuel Zeiler) that compares Hisense Q5 vs. PixelQi (plus a glimpse of the Hisense A5C Pro).
The author states: «The Hisense Q5 has clearly the best contrast and fastest response time. I would say it is a 10x improvement to the old PixelQi tech»
https://www.youtube.com/watch?v=8s4dJu2_ur8