I know, but the difference with the Italian tts_nua_ve1 and VocalizerEX2 is almost imperceptible so I can stick with those. The difference was minimal even with the Vocalizer 3.7.2, but with these I could change the intonations and create a personal dictionary.

Loquendo was an Italian company for which the Italian voices were very well developed, then it was acquired by Nuance and the developments moved to the rest of the world. Google's voice has improved a lot in recent years, being American like Nuance there is certainly a lot of competition for those who speak better, at least in English.