Certificate

EdX is an open online course providing website that provides the reputed courses from various Universities and colleges by charging a minimal amount of money. Some of the courses are even free of cost. They certify you the course after its completion as well.
Yes, it boosts the chances of getting admission in USA's top universities.

Certification is a good choice. MBA could be a better option if you feel the subjects are of your interest. The job opportunities after MBA with a good salary package is definitely high. You can also choose a different stream after completion of a year, according to your interest and choice. It is a stream where you can develop your personality and groom yourself along with the completion of the course. SPPU would be the best to do MBA.

The details provided in the course would be different. In case the duration is same, in certificate you would get generalized training as compared to diploma. Also the eligibility can also be different.

Follow the link below for all the details :
https://www.shiksha.com/it-software/networking-hardware-security/course/certified-ethical-hacker-skills-factory-learning-pvt-ltd-kothrud-pune-276701

For the queries related to the fee and syllabus, kindly get in touch with the college official.
Please refer to the link for details: http://graphiccamp.com/