If your using windows 7 x64 (as you'v linked too) then get the first one.
The only difference, is the first one is the new Catalyst Control Center which they are testing (but will use the same display driver) whilst the second link, is the older style catalyst control center which again will still use the same display driver.
Before you ask what is the catalyst control center, it is just an application that allows you to custimes certain setting for your video card.
Me on the other hand, i just keep it simple and ONLY download the display drivers seperatly from here:
http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx#2
(The first option available)