you took it the otherway.
I meant to say cr mainline has 900 services,so a station in cr wont have more than 900 services passing through it except thane,kurla and cst which also share transharbour and harbour lines.
On the western line since total no of services is 1200,thus no of trains passing through a station can easily go beyond 900.thus i said more emu's pass through a station on wr than on a station in cr