Yes, it's mostly the same. Thank you for mentioning other branches. I hope to create different packages for this branches. Now I just manually switch the branch to most recent one, e.g. 4.19-wip -> 4.19 -> drm-next in second package.
Now I think to create linux-amd-staging-wip, that points to $ver-wip and point this package to $ver. And point second package to drm-next. There is also drm-next from drm subsystem maintainer, which accumulates patches for all drivers in one repo.
Because of that I think that maybe it will be better to create an interective AIO package to make it easy to maintain?