Dear Aspirant!

Hope you are doing well!

I would say, pick neurology, as there are fewer neurologists than cardiologists . However, the burden of neurological diseases is increasing.It would also depend on which subject you like more.As doctors, both cardiologists and neurologists are important for treating diseases of their specialities.

visit here for details;-

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/question-which-is-more-tough-cardiology-or-neurology/amp&ved=2ahUKEwjxjc3hu-n5AhWNUGwGHRbkCXoQFnoECA4QBQ&usg=AOvVaw1hy4YZewDT6nBuFOCuVTrd .

HOpe you find it helpful