kdebase-4.1.0 fc9 size

Why do these 'size' say different things?  Is this because I have the version 
from kde-redhat-unstable, instead of from updates-newkey?

sudo yum --enablerepo=updates-testing-newkey info kdebase
Installed Packages
Name       : kdebase
Arch       : x86_64
Epoch      : 6
Version    : 4.1.0
Release    : 1.fc9.1
Size       : 13 M
Repo       : installed
Summary    : K Desktop Environment 4 - Core Files
URL        : http://www.kde.org/
License    : GPLv2
Description: Core runtime requirements and applications for the K Desktop 
Environment 4.

Available Packages
Name       : kdebase
Arch       : x86_64
Epoch      : 6
Version    : 4.1.0
Release    : 1.fc9.1
Size       : 5.7 M
Repo       : updates-newkey
Summary    : K Desktop Environment 4 - Core Files
URL        : http://www.kde.org/
License    : GPLv2
Description: Core runtime requirements and applications for the K Desktop 
Environment 4.


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