[ssharp]

The MBA was designed more for engineers than "business-guys".

The GMAT is a computerized, adaptive test. I have no idea what the math is like on the GRE but the math on the GMAT doesn't get much trickier than algebra and geometry. A lot of the questions involved deciding whether or not the problem gave you enough information to solve it. It would give you two sets of information and you'd have to pick between something a long the lines of:

Info A is enough to decide Info B is enough to decide Info A & B combined is enough to decide Info A & B combined is not enough info to decide

So even in the "quantitative" section you still need to apply some amount of logic and reason and not just solve equations.

I know engineers who did relatively bad on the GMAT quantitative and folks from degrees that aren't so math oriented who did well on it.

I'd guess that GRE math is a lot more straight forward.