Joe Kindig and other delving minds have, after much research, classified similar LRs into categories and for the lack of a better word....used "school" which is able to accept all "versions" and variations of LRs made in specific areas of mainly Pennsylvania....after much research.
The general acceptance of the word "school" in reference to LRs made in various areas of PA, has facilitated the understanding by even the most uninformed of the features that the various gunsmiths incorporated when building their LRs. This topic alone is very complicated and involves a study of "masters and apprentices" and the gunsmith's families which includes sons who learned "the trade" under the tutelage of their fathers.
Whether one prefers to use "style", area or the more widely accepted, more definitive term "school", is a personal option, but "style" or area doesn't quite "do the job" so why not accept an established widely used "term" which is "school?.....Fred