Hi, so the MBA application process is really composed of: your resume, your GMAT score, your essays, your rec letters, and your interview. This is what will make up your profile or "package."
A good article to read on this can be found on my blog, here:
MAKING YOUR MBA APPLICATION MORE COMPETITIVE https://www.mbaivyleague.com/2017/04/17 ... mpetitive/In terms of GMAT score, it's going to be the same no matter where you're from: in my experience, you really need a 680 or above to be seriously considered at one of the "Top Ten" schools. I have seen people with lower scores get in over the years, so it's not impossible, but it's a rarity, and it's more like 720+ for the very competitive schools like HBS and Wharton.
In terms of your BBA degree, just make sure you have excellent, and I mean EXCELLENT work experience = the best you can get. Your work experience is going to matter more than where you went to school, especially for international students.
Hope that helps!