It appears that http://redump.org/disc/47770/ was the Standalone release, while http://redump.org/disc/26166/ was the release bundled with Play-Pre 2 Volume 2: 2001 August.
So http://redump.org/disc/26166/ should get "Bundled with Play-Pre 2 Volume 2: 2001 August" as datname modifier, while http://redump.org/disc/47770/ should have none