Guys from Dutch Hardware.info site managed to get their hands on Toshiba's N550D netbook with AMD's Fusion C-50 dual-core APU clocked at 1.0GHz. When compared to Intel's Atom N450 and N550, it is quite clear that those are no match for AMD's Radeon HD 6250 graphics found in the C-50.
Of course, bear in mind that we are talking about the C-50 APU, a dual-core clocked at 1.0GHz that only consumes 9W. The Radeon HD 6250 GPU found in this APU is clocked at 280MHz. Just for reference, the top AMD offer, E-350 is a dual-core APU clocked at 1.6GHz with Radeon HD 6310 graphics clocked at 500MHz. On the other hand, Intel's GMA 3150 really has nothing on these new AMD DirectX 11 parts.
The most convincing win is in 3DMark06 where Intel's GMA 3150 barely goes over 153 marks, whereas the C-50 easily scores 1769. The scores are quite interesting as in some tests, Atom manages to outperform the C-50 (like in Cinebench 10) but once again we are talking about AMD's C-50 and not the E-350 which is clocked at 1.6GHz.
You can find all the scores here.