I don't think YouTube makes this clear enough, but if you sign up for YouTubePremium then you getYouTube Music Premium thrown in as well. You might find you can do without your $11.99 / ...
with the $100 YouTubePremium discount, all three phones end up being a lot more affordable than usual. That way, you can get the Google Pixel 9 for only $549, the Pixel 9 Pro for $749 ...