I generally prefer dBuzz because dBuzz has a lot of features and is a much more advanced dApp.
I've also been using dBuzz for over two years and there are a lot of people here that I talk to in the comments and have fun talking to. And I think I have very good communication with the people at dBuzz.
I've looked at Leo Threads before but thought it was too complicated. That's why I didn't use it. After this question you asked, I started to think about taking a look at Leo Threads.
LeoThreads changed from how it was last year, if you want to check it out again: https://alpha.leofinance.io/threads