Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
The FATCA was introduced by the US Department of Treasury and IRS in 2010 to encourage better tax compliance by preventing US persons from using banks and other financial organisations to avoid taxation on their income and assets. It is used as a disclose document between different countries.
The CRS is part of a global standard proposed last year by the OECD, at the request of the G8 and the G20, for the annual cross border exchange of information on financial accounts. Because the standard shares a lot of similarities with FATCA, it is informally referred to as GATCA (the global version of FATCA). So while there is an evolutionary relationship between FATCA and CRS, they certainly are not the same animal.
You have nothing to fear from these procedures, they are there merely to make sure that tax is not being evaded using cross border exchanges.
You can read a fuller summary if these systems here:
I do hope that you have found my reply of assistance.