Not necessarily in terms of builds, but Kodi 19 is more secure, has smoother playback, and is filled with useful features like subtitling, scrapers, and add-on compatibility. If you have a favorite build for Kodi 18, you might want to wait for the team responsible for it to update it to Kodi 19. As old Kodi add-ons were written in Python 2.7 (which is now unsupported), they don't agree with Kodi 19's Python 3 code. Maybe you want to wait or perhaps try another one of the top builds that made it into this Top 35 Kodi Builds list.