Hi mrudulgmat,
Most Programs offer insights and information on their respective websites, so since you know at least a coupe of PhD Programs that you are interested in, you should start there. In addition, you might consider reaching out to the Schools directly (as each likely has a Admissions Department that would be happy to answer your questions).
It's also worth noting that the PhD application process tends to be a bit more 'rigorous' than the MBA application process is - since there tends to be a small group of highly qualified applicants competing for a relatively small number of PhD 'slots.' As such, beyond having a strong GMAT Score, you'll need a strong OVERALL profile and you'll need to properly 'market yourself' to each individual Program that you apply to. By extension, you would likely find it beneficial to speak with an Admissions Expert about your overall profile. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/1) Have you taken the GMAT yet? If you have, then how did you score?
2) When are you planning to apply?
GMAT assassins aren't born, they're made,
Rich