What are the differences between three BAPIs available to create quotes.

Hello SAP gurus.

I am trying to understand the difference between the following 3 BAPIs

that are used to create Quote

BAPI_QUOTATION_CREATEFROMDATA2

BAPI_QUOTATION_CREATEFROMDATA

BAPI_QUOTATION_CREATEBOS

Our company is right now using BAPI_QUOTATION_CREATEFROMDATA2 and so I want to understand

why I can't use BAPI_QUOTATION_CREATEFROMDATA or BAPI_QUOTATION_CREATEBOS instead.

Any feedback regarding this will be highly appreciated.

Thanks

Ram