Dnk, Where did you hear of one of them?. My experience tells me either Star-Delta (where the motor starts in Star and runs in Delta). But a Star-Star starter?. The reason behind the Star-Delta start is the lower current upon start-up, hence a lower voltage drop on the supply lines. And Star-Delta requires 3 contactors. Having said that, I can find no advantage in starting a motor in Star and also running it in Star.
