For years, Samsung users have enjoyed the convenience and privacy of Secure Folder, a separate space on their Samsung Galaxy phones for sensitive apps, media, files, and data. With Android 15, Google joins the party with Private Space.
The linked article below put them to the test on a Google Pixel 8 and a Samsung Galaxy S23 Ultra, diving into their setup, functionality, security, and user experience.
I suppose it is true that a product that has been out longer, should have a better rounded experience.
See https://www.androidpolice.com/android-private-space-vs-samsung-secure-folder