Hi Brendan!
Don't know what you changed under the hood, but the spacing and bold headlines look better this way. What I personally like better about the first approach were the checkboxes in front of 'dump structure' and 'dump data', instead after them. I think standard GUI-behavior is in favor of the first version.
Maybe you could get the format in a way so that the box on the right will be the same size as the left box, so the bottom of the page doesn't move to the top when selecting another option on the left...
Regards, Garvin.