I just saw an article that might provide some insight for those who are struggling between which test to take - the GRE or the GMAT.

Of course, you should look at the schools you are applying to to see if they accept one or both.

As for the article, it says that the GRE test is being revised, and that interestingly, the GMAT may be easier for non-native speakers:

ETS confirms that the revised test still requires basic math skills such as arithmetic, algebra, geometry, and data analysis; however, it will focus more on questions involving data interpretation and real-life scenarios. It's worth noting that both exams were designed for native English speakers, so foreign applicants might find the GMAT's verbal component easier than the GRE?particularly where vocabulary and writing skills are concerned.

The author's article offers some sage advice - which I think I agree with, simply because the GMAT has been around for a long time:

if you are a great test-taker and it's all the same to you, I would stick with GMAT for now. It's more of a known entity and "tried and true" for the schools?no questions asked about why you chose it. This time next year we'll have a clearer picture of things as the GRE becomes more common in the context of b-school admissions, and once the so-called Next Generation GMAT?with its new integrated reasoning section?debuts in June 2012.