Remember that FS9 was developed to only use one cpu core. That being the case, you would be better off with the choice that offers the highest cpu clock speed.
Also, one of the ones with an HD 5650 would do quite well for FS9.
"In our benchmarks with the HD 5650, the GPU is performing on a level with the previous Mobility Radeon HD 4670 or the Nvidia GeForce GTS 250M (with DDR3 graphics memory). This means the performance is sufficient for high details in nearly all DirectX 10 games (only Crysis and GTA4 are not fluently playable in high details - see gaming list below)."
As quoted here:
http://www.notebookcheck.net/ATI-Mobili ... 697.0.html"The performance of the 310M is similar to the GeForce G 210M and therefore located in the entry level class. Modern 3D games like COD Modern Warfare 2 run only in low details and resolutions fluently. Some demanding games like NFS Shift or GTA4 wont run fluently at all. Less demanding games like SIMS 3 run in medium details and resolutions fluently. Therefore, the graphics card can not be recommended for gamers."
Quoted from:
http://www.notebookcheck.net/NVIDIA-GeF ... 439.0.html 