We did them both last year. Seemed like a bit more talent at the Jr. Open but not as many coaches. Could be better this year. I am thinking you are right as far as MD girls will do the 150.
From an exposure perspective UA150 is definitely the strong event, though there are usually a bunch of girls there who don't belong.
One thing to consider -- UA150 has a combine. So if your daughter has great measurables, you probably want to do UA150 just for the combine for this reason alone. And before you ask, yes -- coaches really do look at combine results
