After formally adopting their competition laws, India and Pakistan were faced with the task of implementing them. However, although both countries established their national competition authorities, the CCI and the CCP, almost immediately after adopting their respective legislations, the enforcement of these legislations has not been without complications. This chapter compares the structures, mandates, and compositions of these authorities and their decision-making strategies, and provides a comparative overview of implementation of competition laws in the two countries by reference indicators derived from the orders issued by the CCI and CCP in respect of anti-competitive agreements and abuse of dominance. The chapter also links the performance of the CCI and CCP and their interactions with their countries’ pre-existing legal systems to the mechanisms and institutions employed by the countries in the adoption stage and the compatibility and legitimacy generated through them.