An article I read here https://www.musictech.net/2018/10/time-stretching-and-pitch-shifting-in-cubase/
suggests otherwise. (the relevant commment is under Using Algorithms section) MPEX is supposed to be the better of the two, but I think it is taste and test.
I just had to master an audio stereo 24 bit 44.1khz EDM track that needed to change BPM, it was lolloping at 121BPM and I Time Stretched it to 126BPM ( as well as muck about with a straying tempo before doing so.) and I needed it to stay at the same pitch. I am working in a 24 bit project file.
I tried MPEX Complex,the the highest setting, and it took a while to complete but the end result though crisp had a feeling I can’t explain but it felt slightly clinically stripped, a bit cold somehow and I could notice it the most in the tom sounds. So I went with Elastique Formant Time. And that did the job and a lot quicker, leaving the indefinable warm feeling that MPEX was stripping out, though I may try MPEX Musical mode if I have to do this again, since it worked well enough this time, I am moving on.