I think the relevant comparison is the developer beta, which has access to the Gemini-powered Siri that will roll out publicly later this year. From the reviews I've seen, Apple won't be "years behind" (which surely they were) for long.
And the voice is still a poor text to speech model, very far behind GPT live.
That said, Siri seems a little bit better now - my subjective opinion. It is a little bit less frustrating.