Debian and Ubuntu have similarities, but keep in mind - Ubuntu is derived from Debian, not the other way around. However, they differ in areas like release cycles, package management, and default configurations.
What you just said is such a well known truism, so it is actually rude to imply that someone on HN would not know that. My point was, however, is from the users point of view Bookworm is very very similar to 22.10 however it is an lts, so for those who want to switch from Ubuntu, this is the experience they should expect.