Synaptic can sort packages based on origin--I am sure that apt or aptitude can do that on the command line, but am not going to search that for you.
MX uses the Debian repos, with its own repos on top like icing on the cake. We have our own native mx* packages, many backports of upstream Debian packages in main or testing, many many packages that aren't in Debian yet or that we improve for our version (Foliate, Strawberry, MystiQ, Pale Moon, and Cawbird are some that I maintain just off the top of my head), so I have to dispute that MX is "just Debian with makeup" and that the packages are "99.99% pure" Debian.
Ow, my eyes are rolled so far back they got stuck.
Most of the native MX packages begin with mx-, so that's another way to sort them...I can remember a couple that don't, like aptgpg or apt-notifier, but those are just utilities. Oh wait, we have a metapackage to manage the mx-apps and remove obsolete versions, called "mx-apps":
Code: Select all
Depends: bash-config, mx-bootrepair, mx-boot-options, mx-conky, mx-codecs, mx-datetime, mx-docs, mx-menu-editor, mx-network-assistant, mx-packageinstaller, mx-remaster, mx-remastercc, mx-repo-manager, mx-select-sound, mx-snapshot, mx-system-sounds, mx-tools, mx-tweak, mx-usb-unmounter, mx-user, mx-viewer, mx-welcome, mx-live-usb-maker, live-kernel-updater, live-usb-maker, mx-idevice-mounter, ddm-mx, conky-toggle-mx, formatusb, mx-cleanup
Breaks: docs-mx, install-meta-mx, installer-mx, remaster-mx, switchuser-mx, user-management-mx
Replaces: docs-mx, install-meta-mx, installer-mx, remaster-mx, switchuser-mx, user-management-mx
Some of those also have dependencies on other native MX packages.