You could buy a model Y and pay a custom audio company to make a bespoke audio system for it, and still have enough left over to buy a full second model Y. I am having a hard time understanding the relation between this comparison.
If audio is that important to you, buy a model Y and hire someone like Reus audio to put in a 10k audio system in it, then buy another model Y, "because you can" and still save 10s of thousands over the price of a taycan.
Dont get me wrong, I think the taycan is an awesome car, but its literally 2 - 3 times as much as a model Y, depending on which one you pick, so saying "is the audio between these two comparable" is perplexing to me.