Voice, I think you need to go back and look at the original question. Age was identified from the start. It is also my understanding that a U17 team (High school Juniors for the most part) was used because it is approximately the average age of a high school team.
Actually, in this case, it is very easy to compare the two. Last years state champions for club were CESA U17 and the high school 4A champs were South Aiken. I don't believe there is much (or any) overlap of players on both teams. Therefore you can get into argument of which team would win if they played one another. Now I don't think the original poster wanted to turn this into an South Aiken vs. CESA discussion, but only to know which type of team would be stronger. Clubs obviously have an advantage in Geography over high school teams but that's not to say a high school can't have a good team.