Hii Aspirant..

Generally there is no difference or compensation provided for SC students for St students for or donation fees in private colleges in the country.

There are many private colleges in the country which provide direct admission BAMS course. 

Although you have not mentioned any college specifically thus I cannot tell you exactly about the college that you are talking about but I don't think that there is any special compensation for privileged students like SC ST in the donation fees.

Hope it helps. 

Best of luck