Tax module in Oracle ERP Vs Sabrix integration to oracle ERP - Toolbox for IT Groups

Hi, 1- I would like to know the as to why most of the Oracle ERP implementations integrate Sabrix an external tax calculator instead of inbuilt Tax module in oracle ERP. 2- What are the benifits and advantages of using Sabrix over Oracle Tax module 3- Nam

peoplesoft.ittoolbox.com