Both are different!!
When i had to attend a friend's marriage, he told me, arrive @ BCT & i'll catch u!!
I was confused & thought it to be some vacant station, but rather shocked to watch the balanced crowd & train's quantity/quality.
BCT is Western Railway, while CST is Central Railway.
By...
more... railway tracks, Dadar is the only connecting point, from where u can board trains for BCT (DDR) / CSTM (DR)