I think GMAT is supposed to be a bit easier, but it seems you can apply for a lot more things with GRE. GMAT seems mainly targeted at business/management programmes - some of which will only accept GMAT but I think I've seen far more that accept either, or only GRE. What kind of programmes do you have in mind? It should be this that drives your choice. Suggest you look at the websites of the courses you're most interested in and see what most of them want.
Edit: if you type your thread title into Google there are a number of articles on the subject, although most of them seem to be from a US perspective. This one has a pretty comprehensive comparison between the tests: http://www.west.net/~stewart/gmat/gmat_or_gre.htm
Last edited by sj27; 26-05-2012 at 10:29.
mba.com claims to be the official GMAT website? But the wiki article seems to imply it is run by GMAC?
Maybe contact one of the unis and ask them which to use?
Last edited by sj27; 26-05-2012 at 15:25.