M35X M35S suspension differences
 

I am looking to buy an M35 2006-2008. I like the handling of the M35S but the AWD capability of the M35X.

Specifically what are the differences between the two suspensions? I know the S has active rear steering. Are there differences in the springs or spring rates? Any differences in the struts/shocks? Are the sway bars different? If different, are the parts interchangeable? Is there anything that can be done to the G35X to bring the handling closer to that of the M35S? Does the M45 or M35 have traction control, or limited slip differential?

thanks for any feedback or information.