I think RD-93 was the one to power the initial batch of the JF-17 until WS-13 gets the clearence. However i did also read about a possible development of an RD-93b which was suppose to be completely smoke free and with 10% more thrust. However this is not confirmed.
Yes I have only read posts about RD-93B. Not sure if there is something like this in the works.
BTW, a question for the Indians on the board, how is the smoke issue on the IAF Mig-29s? Is it noticeable?