ISU upgrade from 4.6C to ECC 6.0 (CIC)

Hello there

We are currently going for an upgrade from 4.6C to ECC 6.0

Can anyone of you provide some insight on whether the frontoffice and other configuration in 4.6C have any kind of impact on ECC 6.0? Basically I can see that there are new functionalities in ECC6.0 for CIC . But will the current config lin 4.6C like action box , move in/out processes, owner allocation etc will be impacted after the upgrade?

Thanks

Gautam