Yes. The download version has the packages current to that version. If you buy Mandrake it is unlikely that you will have newer versions of the download packages. Usually you get some support, the ability to join the Mandrake Club and some propietary packages (like Nvidia drivers). And the warm feeling that you've just donated to the community.
If you want KDE 3.3, you'll have to download it - via Urpmi
and Mandrake Cooker.