This is not true at all, oh God...
The suspension layout of the two cars can not be more different within the existing rules. Polo R5 suspension is based on the concept of Fabia S2000 not the R5 which is completely different and I believe that one of the reasons why it is different was to get rid of the power steering issues.
It's a simple fact that the higher castor the higher forces in the steering hence why steering issues are well known with most of the cars with so heavily inclined front struts.