SAP BPC Advantages over ECC(R/3)

HI Experts,

Can  someone help me to list down what are the Advantages/Benefits of using  SAP BPC 10 NW for planning instead of ECC(R3)

coz even we can do planning in ECC

i need to give the presentation to one of my client and  SAP  FICO TEAM

i Do Have Advantages of SAP BPC over Excel but looking for advantages/benefits over SAP ECC

Thanks in Advance

Regards

Bhupendra Arya'