When it came to building Apache using GCC 4.4 with the job count set dynamically by the Phoronix Test Suite to twice the number of CPU cores, the dual-core Fusion E-350 setup was noticeably faster than the Atom 330 even though this low-power Intel chip is dual-core with Hyper Threading.
Lastly, when looking at the time to build the Linux kernel on each system, the Fusion E-350 was still much faster.
AMD's Fusion APU platform is certainly interesting and overall it does work well with Linux aside from the current open-source graphics issues, which will hopefully be fixed promptly, after which we will deliver the E-350 closed and open-source graphics benchmarks for the Radeon HD 6310. Once we get our hands on a mobile Fusion system, we will also deliver power consumption results.
As far as the processing power goes for the E-350, these results show that under Ubuntu 10.10 with the Linux 2.6.38 kernel it is usually much faster than the common Intel Atom 330. You can also look at more results on OpenBenchmarking.org for both Linux and FreeBSD. Running phoronix-test-suite benchmark 1103157-IV-1103078IV11 on your system will also show how your particular system compares to the results shown in this article.