First of all any degree depends on the institute. You should go for the best one of your options. Secondly difference between the two degrees is of the subjects or courses. In Bcom accounting you will study all the basic commerce subjects along with accounting. Accounting is a very basic course. In BA accounting with Finance you will study Finance as a major subject. I think that BA accounting with Finance would be a better option as you can study the basic and major courses both with it.