There is a quote, "Good artist copy, great artist steal." That is the question now put to Coldplay. Recently Joey Satriani has filed a law suit against Coldplay for stealing a musical sound; tantamount to plagiarism. He's suing for any and all profits. The song in question is Viva La Vida. Now the Internet and music world is buzzing over this news.
Decide for yourself as a youtuber has overlapped both songs in a comparision video. For a better understanding read the complete article here. You'll find out who is behind that great quote too which may impact your thinking.