Honestly, the dock releases, even the minimal dock has better downloads than the panel version. It uses Cairo Dock, which after a long time has released updated packages.
As for customized, the theming is customized. But honestly, the theming of the standard Manjaro “community edition” is not that great and hasnt been updated in forever. One of the advantages of SbK spins is there are tons of themes the user can choose in the SbK repo. All SbK themes except the earliest have a Cinnamon theme, even those used on other desktops.
Please tell me what differences, other than the theme, are there between the Manjaro minimal community edition and the SbK Cinnamon panel release?