Cheap brake pads experiences (TRW, Bosch etc.)

Hello everybody, has any of you brake pads from Bosch or TRW installed on the R8? Since there is a price difference of more than 400,- €, can you hit it without hesitation or do I save it at the wrong end? Followed by two comparison links: Original Audi: http://www.audishop-leipzig.de/product_info.php?… TRW brake lining: http://www.bramen.com/braking lining-panel brake/trw:gdb1688.html Greetings CL6OO