My personal experience with open source drivers versus Catalyst is that Catalyst is generally buggier (Xorg takes 20% memory at times (memory leak)) while the o

My personal experience with open source drivers versus Catalyst is that Catalyst is generally buggier (Xorg takes 20% memory at times (memory leak)) while the open source drivers work perfectly and have similar FPS (haven't done benchmarks, but it can't be more than 10-20%).