Precision M3800 OR XPS 15

Hi guys, hopefully now that the m3800 is out I can some advice as to what to get, I don't know which one to get as both are very similar, main difference I see is the graphics card, but if that's the case, isn't xps15 GT 750M better than precisions Quadro? I'd appreciate any help.

What other differences are there that would make a better labtop from the other?

I do graphics design for a living.

Thanks.

Precision M3800 OR XPS 15