Hi, Out of 2 you can find much scope in law than BA Hons History. Though options you can find good after BA Hons but LAW directly can be the best if pursued with passion and interest.
Under BA Hons History you can study topics on history of India, Languages, History of other countries as well.
Detailed syllabus you can check here: http://www.du.ac.in/uploads/old-ug-courses/27412_History_BA_HONOURS.pdf

Under BALLB:
You will study about Legal methods, History, Contracts, Pol science, Economics, Constitutional Laws etc.

BALLB is a one step ahead course for law studies. It is more professional in terms of BA Hons History.
Hope you can make the sense out of the above.
Good Luck.