For what it's worth ... although I didn't really rate the chilli grabs we had in Singapore, it had played on my mind somewhat and I thought I could make a better dish with large prawns so it became the basis of this variant I make at home. Chill Prawns. Very smilar in many ways, less mess , prefer prawns in this dish to crab. I like my crab fresh or "pepper". My dish has a more intense sauce.