I have just bought a new Pi4 and want to start off with Ubuntu OS rather than with Raspberry Pi OS. I wasn't sure if I should use NOOBS or Raspberry Pi installer for setting up the OS on the microSD but ended up using the Raspberry Pi installer to set up the OS anyway.
What is the difference between the two and when should I use one or the other if I want to set up an OS other than the official Raspberry Pi OS?