If it wasn’t much of a difference, they wouldn’t have to do it. Maybe it’s scored like the old SAT’s, and wrong answers are penalized.
Found this on some test-prep-looking web site: “In order to pass the Delaware bar exam, you must score at least 145. This equates to 145, based on the MBE’s 200-point scale. The scores of the exam sections are weighted as follows: written portion 60% and MBE 40%.”