Will existing FIITJEE students write the Big Bang Edge Test on 20 October 2019?

Is it useful for a student already enrolled in FIITJEE class 11 to write the Big Bang Edge Test for class 11 scheduled for 20 October 2019? What are the advantages and disadvantages?

There are no advantages for 11th and 12th students to give big bang and other test other than for admission. Instead if your are enrolled in fittjee already then give their aiits and aits and mypat exams that would more benefit

Thank you.