XTTSv2 is only slightly behind StyleTTS 2 near the top of the TTS Arena leaderboard, though they are both far behind Eleven Labs: https://huggingface.co/spaces/TTS-AGI/TTS-Arena

Personally I prefer StyleTTS 2, and it has a better license. But XTTSv2 has a streaming mode with pretty low latency which is nice. I did run into hallucination issues though. It will hallucinate nonsense words or insert extra syllables in words, pretty frequently.

As others mentioned they shut down so there won't be any updates to XTTS.