https://www.raspberrypi.org/downloads/raspbian/
Raspbianのページ

Raspbianのリンク先

Raspbian Buster with desktop and recommended software
https://downloads.raspberrypi.org/raspbian_full/images/raspbian_full-2019-09-30/2019-09-26-raspbian-buster-full.zip
Raspbian Buster with desktop
https://downloads.raspberrypi.org/raspbian/images/raspbian-2019-09-30/2019-09-26-raspbian-buster.zip

本物のARM版のはRaspbian Busterと書かれてる
x86版のはDebian Buster with Raspberry Pi Desktopと書かれてる
あくまでRaspberry Pi DesktopのDebian Busterじゃん