GPU vs CPU rendering

NO
as you can see they choice CUDA (im my post unlike yours, there are links confirming what I say)
even in luxrender now CUDA faster than openCL
1- Octane - cuda ONLY
2- Fstorm - CUDA ONLY
3- REDshift - CUDA ONLY
Cycles
AND
AND
Even Marvelous Designer simulations say NO to AMD
and so on…

they made a choice (already!) for a reason - you yourself can ask GPU programmers why - why they do not care about AMD and openCL - and you learn many sily things about openCL
lol, why am I writing all this to nowhere . in short - there are links confirming what I’m saying.
Dot.