A drawdown is a drawdown.both reduces available money.the only difference is a floating DD and balance DD. The floating DD happens with open position(s) and affecting the account-equity. This could lead to a margin-call. A margin call happens mostly if you are overleveraged or if you not limit your losses with sound stopploss or false moneymanagement.
An balance DD occures, if your balance shrinks of too many losses in a row and if your winning trades did not overweight your losing trades.