Different content between download.opensuse.org and rsync.opensuse.org

Currently, I’m mirroring OpenSUSE repositories under OBS section, it’s:
http://download.opensuse.org/repositories/
and it’s corresponding to:
rsync.opensuse.org::build-service-repos
but after follow the instruction at:
https://en.opensuse.org/openSUSE:Mirror_infrastructure
using the following command:

rsync -av rsync.opensuse.org::buildservice-repos ./

I observed that the content between the two are different, for example: the directory /network:/time/openSUSE_Leap_42.2/x86_64 (rsync) has the different content from http://download.opensuse.org/repositories/network:/time/openSUSE_Leap_42.2/x86_64: the ntpsec.rpm package, *-debuginfo.rpm, *-debugsource.rpm are missing (in rsync ), so as other repositories.

So I don’t understand why it differs and which source is more reliable?
If download.opensuse.org is complete repo, then how can I mirror from there instead of using rsync?

It looks like rsync has not been updated since February. :’( Anyone at SuSE know what’s up?