I would further add that previously once u r granted skilled state sponsored independent visa (176) and u opt for that and by the time ur original application for skilled independent (175) also approved, then u will be granted skilled independent visa and the visa granted in the last will be ur final visa.So was the case in the past.I think it will also be in case of 189 vs 190 but i have no confirmation about this so far.
However, I believe that first u should apply for 189, then get SS and in this way u will manage to get 190 early.U just accept it and go for 190.Subsequently, ur application for 189 that was in the process que got approves and u then became holder of 189..............
Request for comments plllllllll.