I like Yasmina. I think Yasmina is more solid and less frilly than Jasmina (I'd pair Jasmina with more fluffy princessy names than Yasmina). I don't really like Iasmina.
Yasmina is lovely, though I prefer Yasmine (yaz-meen), which I think has an easier flow. When I see Jasmina, I want to pronounce the J as a hard J, not like a Y.