Why is there difference in zerodha coin and groww for sip in mutual funds.

I was doing my research to start a sip aand I found that the process is different in zerodha coin and groww. In zerodha coin it is showing initial amount and in groww which is not there . In zerodha coin it is showing minimum instalment amount 1000 but in groww it is 500 only for same mutual fund. Why is it like this ? Do the platforms set the minimum instalment amount ? Which broker is best to do sip? Edit: i have added a ss in the comments.