Discrepancy in f26 iso sizes

[JD]

On URL https://getfedora.org/en/server/download/
the iso size is 2.2 GB,

and on URL http://mirrors.kernel.org/fedora/releases/26/Server/x86_64/iso/
the iso size is 484 MB

Onn URL https://getfedora.org/en/workstation/download/
the iso size is 1.5 GB,

and on URL 
http://mirrors.kernel.org/fedora/releases/26/Workstation/x86_64/iso/
the iso size is 482 MB

Downloaders:  beware!!