I am working on it. I will have more on this later in the week. BTW I had the under 9.5 in the Yankees game today.
I would relate it (7.5, 9.5) to laying 3.5 on the road in FB. To me, it just seems harder to hit the over on these 2 numbers. Believe me, I've tried and nothing is more frustrating than it landing on 7 or 9.