hello,

in IIMa less number from a large group are sleected as compared to harvard , but it is definately tougher to get into harvard as there are other paramteres too. one needs to have good track records , some prior work experience too (of two years for MBA) , good gmat score too , and other things , so here you are not judged ona single parameter but a lot more. Also at harvard brilliant students from all over the world apply to get a seat , so there is much competition in this way.

hope it helps

all the best.