good luck! i read in an article from a product that hit #1 that launching on the same day big ones do can be tough (for obvious reasons) but it also means it's generally higher traffic those days so it could work to your advantage.
another good takeaway i got from it was that you should launch between like 12:01am-12:10am PST since that's when new products are released and this way you'll get an entire day of coverage across the globe~
either way, congrats on all the hard work and sending you the best of luck for the launch!