Yes. <- this answer is as clear as your question.
For someone else to give you a better answer - it would help to clarify the purpose of your question. That way those in the know can not only answer your question, but they can let you know if the answer is relevant or useful for your purpose. Or, if it really doesn't matter. It could be that they mostly use MV because it's been around for 8 years, and the migration over to MZ is slow. It could be that everyone jumped ship in 2020 from MV because.... (enter excuse here). Or not.
Are you looking at buying one or the other to start making games?
Are you looking at how to mod them?
Are you looking at how to rip content?
Are your looking at translator apps?
Just curious?
Other?