AAA stations focus on alot more current music from artists like Death Cab For Cutie, The Decemberists, Fiona Apple, Ben Folds, Beth Orton, Tori Amos, Ben Folds, Snow Patrol, Aqualung, Radiohead, KT Tunstall, just to name several or so and less gold. On a Rock AC station you're more likely to hear songs by America, James Taylor, The Who, Bob Dylan, The Beatles, Elton John and more '60s and '70s artists than you would on a AAA station. So essentially AAA = more current based; Rock AC = gold based with currents mixed in.