Although recently most MBA program accept both GMAT and GRE, as well as EA, exams, the adcom (admission commitee) usually prefer GMAT over other exams. So, if you are certain to go for an MBA or other business programs, you should choose GMAT, but if you are still deciding between business programs and other programs, GRE is a safe choice because it can be used in either. 

Executive Assessment (EA) was designed to be used for executive programs. The exams questions are very similar to GMAT but it is shorter, easier, and more business-oriented. If you are applying for an executive MBA, EA is a good option because it requires much less time than GMAT. However, if you decide to go for an MBA, GMAT is still a better choice. 

It is recommended to have at least 2 years’ experience before applying for an MBA or approximately 3 years’ experience at the start of school year (September). But, too much work experience is also not a good thing. It is believed that 5 years’ experience is the maximum before there is a negative correlation between work years and acceptance rate. This is because the more experience you have, the more expectation they have of you to show your accomplishment during the application process. Therefore, the most favorable would be between 3 and 5 years.

Yes, it is important to get you pass the requirement for university’s application. But once you pass the requirement level for either exam, it is no longer the main factors to consider a candidate. Therefore, you should aim to only pass the requirement score for your application, then spend the rest of the available time in the GMAT, essays, resume, and other factors, including letter of recommendations and interviews.