Just listening to it, it's subjectively not better, but if it's > 10x faster/cheaper, I would use it anyway -- it's good enough to be listenable.
Eleven Labs is the first voice synthesis that is good enough that I'd listen to an audiobook generated from it, but pricing is such that it would cost $100 to synthesize a 10 hour audiobook. A little too expensive. If they could get it down to $10 I'd cancel my Audible subscription and just synthesize audio from ebook text.
So if I can get a locally running voicebox model and just leave it running on my laptop over night transcribing an audiobook, that's even better.