Both teams will have significantly different rosters after August tryouts. The good players on all of the other teams will want to make Heros, M&D or SW before the teams lock for HS. The rich get richer.
It would be foolish to move to these teams or any "elite" team for 3 reasons: 1. They would be resented for taking a spot of a former teammate 2. Why move from a club where you are a top dog to one where you might get little playing time? 3. Colleges don't care about the name on the front of the jersey, only the girl wearing it.