The difference is four months - not two. If you include a couple of repeats it increases to about five months. It can matter depending on who the kids are and certainly if there is an advantage it diminishes over time. LI exaggerates it and MD minimizes it - probably somewhere in the middle.
The best is the in state fighting on the topic. Where you have the M&D Red Team parents saying that the Black Team is all hold backs and Red Team are the "true" 2025s.