There is no easy answer to this question, as it depends on a variety of factors including your goals, physical ability, and personal preferences. If you are primarily interested in self-defense, then Krav Maga may be the better option for you. However, if you want to compete in grappling tournaments or simply want to learn a traditional martial art, then BJJ may be the way to go. Ultimately, the best way to decide is to try both and see which one you prefer.