GPG keys Filename naming

[salmon5]

hello,when CentOS8 installed,the gpg filename is:RPM-GPG-KEY-centosofficial and RPM-GPG-KEY-centostesting
/etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
/etc/pki/rpm-gpg/RPM-GPG-KEY-centostesting
and /etc/yum.repos.d/CentOS-*.repo gpgkey= also is.

but the flollowing url,the gpg key filename is:RPM-GPG-KEY-CentOS-Official and RPM-GPG-KEY-CentOS-Testing
https://www.centos.org/keys/RPM-GPG-KEY-CentOS-Official
https://www.centos.org/keys/RPM-GPG-KEY-CentOS-Testing
http://mirror.centos.org/centos/RPM-GPG ... S-Official

the Filename not same,it look's like RPM-GPG-KEY-CentOS-Official and RPM-GPG-KEY-CentOS-Testing naming more official,
can they be same?

thank you!