Wildly Varying Scores on GMAT and GRE - Should I Send Both? I am applying now to PhD programs in various management related fields (quantitative marketing and finance) and took both the GMAT and GRE back in October.

My score, specifically in the quantitative section, wildly varied between the GRE and GMAT. Basically, this was the breakdown of my scores:

GRE:

Verbal
159 (81%)

Quant
160 (78%)

Analytical
4.5 (80%)

And on the other side...

GMAT:

Verbal
40 (91%)

Quant
41 (49%)

Total
660 (80%)

Analytical
5.5 (81%)

Integrated Reasoning
8 (92%) [Perfect Score]

None of the schools I'm applying to exclusively accept the GMAT, but many do state that they prefer it. I'm wondering if I should just simply hide my GMAT or if my GRE in combination with my GMAT make the quantitative section there look like a random fluke.
Since the fields you mentioned (quantitative marketing and finance) are both heavily based on mathematics, I would think that the quantitative score is by far the most important. If you can possibly avoid it, you don't want to be in a position of having to explain away a weakness, especially where the weakness is at a very important criterion.

Thus, I recommend that you submit only the GRE score and make no mention of the GMAT. Although your verbal score in GMAT was quite good, it isn't quite as important for those fields you are applying for, and the mediocre quantitative results would probably outweigh anything positive you might otherwise have.

That said, you could simply call the schools you want to apply to and ask them directly; since each school might have different preferences for GMAT and GRE and their respective scores, one blanket answer might not be suitable for all the schools you are applying to.

Specifically, you could try to talk to the department chair or to the graduate program director (just call the department office and ask to be transferred to the right person). You don't have to identify yourself; just say that you want to anonymously ask a question related to admissions.

I know that that last suggestion might sound wild, but believe it or not, it often works surprisingly well--I recently used that kind of strategy to receive anonymous answers from a research ethics office concerning a grey research ethics question I was faced with, and I quickly got the exact clarity that I needed for my situation. Never underestimate the power of picking up the phone and calling.