GangaI have just seen lots of pics of Moss Rose (I think) being called purslane (and pig face). it is indeed NOT common purslane. And they are easy to tell apart.
Common Purslane (Portulaca oleracea): Not to be confused with pigface; an annual herb with flatter leaves, often called "pigweed".
Sea Purslane (Sesuvium portulacastrum): Salt-tolerant, creeping, succulent with smoother leaves, often called NT Pigface.
Pigface (Carpobrotus): Native Australian succulent, triangular leaves.
Moss Rose (Portulaca grandiflora), also commonly known as Pig face and also Purslane but is ornamental and not the closely related common purslane.