Fiscal Calendar - What is the difference/advantage of using fiscal vs. yearly calendar - Accounting

There is a business need at the company where I work for an India Ledger to be created.  India has a different calendar year than U.S., so our thought is to create a primary and a secondary ledger - primary fiscal year and secondary calendar year.  We wanted some advice as we are wondering from the Oracle Apps perspective what is the difference/advantage of creating a fiscal year versus a calendar year.  From a setup perspective we are able to create a calendar year with April as the first period so not sure what would be the best approach and if