Clark - the premier teams always play with "restrictions" when playing the challenge teams. They use this time to do things like play only with their weak foot, required to make a certain number of passes, score only on crosses/headers/etc. The goal is not to "win" but continue development in a scrimmage situation. Hopefully the goal is that all teams get something out of the scrimmage.

Having played premier league, size does matter. The speed of play and physical nature of the game is definitely increased at the next level.