락페 Rock Am Ring과 Rock Im Park은 무슨 차이가 있나요?

글보고 급 궁금해져서 구글링 해봤습니다. 아래는 위키에서 긁어온 내용..요약하면 같은 라인업으로 다른 지역에서 시차를 두고 이뤄지는 거의 동일한 페스티벌이라네요. 설명으로만 보면 거의 동일 페스티벌로 여겨진다니 라우드팍 도쿄 / 오사카 수준인거 같은데...왜 굳이 이름을 달리하는지는 딱히 이유가 안나와있네요.

The Rock am Ring (German: Rock at the Ring) and Rock im Park (German: Rock in the Park) festivals are two simultaneous rock music festivals held annually. While Rock am Ring takes place at Mendig on an old airbase; Rock im Park takes place at the Zeppelinfeld (49°25′44″N 11°07′19″E) in Nuremberg, in the south.

Both festivals are usually regarded as one event with a mostly identical lineup for both festivals. All artists perform one day at Nürburgring and another day in Nuremberg during the three-day event. There have been minor exceptions in the past years where an artist would be announced for one of the festivals only. Combined, Rock im Park and Rock am Ring are the largest music festival held in Germany and one of the largest in the world with a combined attendance of over 150,000 people in 2007, selling out both events in advance for the first time.[1]