Both Law and Liberal Arts widely different courses. While BA.LLB and Liberal Arts may have similar subjects, the syllabus and teaching methodolgy may differ from one another. Liberal Arts, as the name suggests has multiple courses to choose from within the span of 4 years. Moreover, it can prove to be beneficial if one aspires to pursue post-graduation from abroad as certain International Universities, especially in the U.S, require a completion of 4 years in any undergraduate course. Whereas, Law (5-year integrated) is a professional degree course which prepares you to join the profession right after graduation. I suggest you must take an aptitude test to further clarify your doubts. Furthermore, if you still have some doubts, you can take the entrance tests of both Law Schools and Liberal Arts Colleges and then, let the results decide.