Nowadays Hindustani musicians sing Brindavani Sarang with both the nishadas (kakali in in arohanam and kaishiki in avarohanam). This raag is known as Brindavani in Carnatic music. There is a raag called Madhmad Sarang (Madhyamadi Sarang) which is exactly the same as Brindavani Sarang in its movements but uses only the komal nishad (kaishiki nishada). So in today's time, it is Madhmad Sarang that would correspond to (Dikshithar's) Brindavana Saranga.