SAP PO 7.31 or SAP PO 7.4

Hi folks,

We are thinking about upgrading our SAP PO 7.31 SP04 to one of the latest SPs.

I have been reading about the newest versions, and enhancements of each SP but I still have some doubts.

If I´m not running HANNA and I don´t have intention of doing it, ¿is there any reason to go for: 7.4 - SP11 instead of 7.31 - SP16?

Reading other post and documents, I have come to understand that the only difference between SAP PO 7.4 and SAP PO 7.31, is that SAP PO 7.4 is optimized in case you want to use HANNA as underliyng Database. is this right?

Thanks in advance.