India has to improve several important sectors if it wants to become the leader of the global south or replace China. The manufacturing sector and the education sector and even the law are still very unsupportive for India to replace China which has a fairly good position on all factors. The most important with education qualities drastically difference between India and China.
it will take India some years before they will start improving to replace China because they are still using their old economic policy which is still affecting their investors not to continue maintaining their quality products they where producing in the past when they have potential leaders.
I don't sure how many decade need by India to reach the same level with China has made quite good progress in all factors, including education, law and even economic conditions.
I think the only one advantage or possibility for India to compete China about the total population and every years the population increases every year without being accompanied by better economic conditions.
If India can work on their leaders to change some of the things that is not making manufacturers in their country not to progress like other manufacturers that is getting more support from their government financially and materially to progress and to enable them to spread their products all over the world and, I believe it will surely make India to explode in quality and quantities products more than China in the nearest future.