Success rate doesn't depend upon SDS and Non-sds, rather your profile. These two categories are generally made for some countries where students are more in quantity, so they have option to choose SDS, hence, they can get response within 3 to 4 weeks.Is it true that NON-SDS visa success rate are less compare to SDS? I am planning to go with non-sds earlier but after watching several youtube videos I am getting confused whether I shall go with sds or non sds. I have written PTE test not IELTS where my score is more than 79 in each section.
Secondly, no! you can't apply for SDS category if you don't have IELTS (no less than 6 in each module)