I'm looking forward to the release of paralives (this year hopefully). Been watching the development for a few years, seems like the devs care about the project.
From the dev videos, the main difference between Inzoi and Paralives is the personality and art design of both the world and the sims. Inzoi tries too hard to be realistic and loses all quirkiness and fun that came with the Sims. The animations and interactions in paralives are very well designed.
Element X is the new version of Element. There's currently 2 versions available on the store/fdroid since X is in beta.
The fdroid versions of Element X and Schildichat X both seemed to require me installing and setting up nfty to get notifications working.