Maybe I'm wrong (and if so, please feel free to beat me mercilessly), but nobody brought up Lollapalooza because they thought Coachella would copy Lolla in terms of the style or quality of acts - rather, Lollapalooza was mentioned because a joke was made about Daft Punk, NIN, Muse, the Killers, Phoenix and RHCP being confirmed. Seeing as how those would be SIX HEADLINERS, and Lolla traditionally has two headliners per night, playing opposite one another, the joke was that Coachella was going to do the same.
Did you really need this explained to you? Do you have a helper monkey or something that assists you in putting on your pants in the morning and brushes your teeth and gets you on the bus? If so, can you ask Chim Chim to read this thread to you and explain what people are saying?