More what they shoot modern or traditional gear, you will find traditional bow guys in general archery clubs, but not the other way around, a traditional club is folks who shoot longbows and recurves, typically no sites, arrow rests, releases, etc. some are into the historical/reenacting stuff, but by no means all of them. The main difference I have seen is in the type of shoots they put on or attend. Traditional cub shoots I have been to are, like I said, limited to recurve or longbow, no sights, no mechanical releases, no mechanical arrow rests or overdraws and the targets are closer. General archery club shots have more classes, so you find folks with compound bows that are shooting all kinds of sights, mechanical releases, overdraws, and every kind of gadget you can imagine. Don't think I am bashing compound bows, I still have one, but I hardly ever shoot it, to be contradictory a traditional is both simpler and more difficult. As for style of shooting traditional bow shooters generally don?t use sights, I shoot instinctively, but there are other styles, indirect, gap, string walking, and more, plus variations.
Todd