The thing i found of interest is the idea, that sau even though it is that you say find ATI cards and etc, of say series or version in within Radeon of the ATI releases, many cards are not just ATI cards. Which is fine usually cause they still are something made from ATI, which is now AMD. So they are probably ATI/AMD designed and manufactured cards. More saying With ATI and AMD then just ATI and what other manufacture/developer/designer. Think goes back and forth once and awhile. But still. It seems at some point in time, not mainly that of just ATI graphic cards.
So of it though to say, yes having AMD in the section will be more helpful on the idea of ATI graphic cards. Rather Radeon or not i dont know. More video cards you buy from someone other then either really, but of it though still is the idea of "sectioning". For the newer changes and updates to say.