leah:
Thank you for your detailed and informative response to my question of HOW THEY ARE DIFFERENT Your explaination is full of wisdom and information that clears up HOW THEY ARE DIFFERENT and what sets one apart form the other.
I think I am going to start a movement to have you named the wisest man on the board. And would everyone vote for you? Well to quote you, "DUH"
Hey Leah,
The broadest answer would be, as was set out earlier, "all DIR divers are also using a "Hogarthian" configuration; but not all "Hogarthian" divers are using a DIR configuration".
Essentially, looking only at equipment for a moment - although the other aspects of DIR are probably far more significant in terms of describing the differences between the two, (while both terms are illusory and change over time) "what was/is and was not/is not DIR" used to be rather strictly prescribed by the WKPP. I believe that more recently "changes to what is considered DIR" have begun appearing on GUE's Quest website, but I could be mistaken and I'm sure I'll be corrected if I am. DIR sought a nearly identical configuration for all WKPP divers, down to what was carried in the diver's pockets, and deviations from the prescribed equipment list were frowned on. (Historically it is my understanding that Bill Main (and others) played a significant role in the development of a configuration that was eventually considered optimal by the WKPP, first under Parker Turner and later under George Irvine in the early to mid 1990s.)
In contrast, what was/is "Hogarthian" (I'm not sure that word actually has any true meaning anymore) has generally been far more broadly interpreted, so that a much wider degree of variation between divers falls within its ambiguous boundaries.
Essentially, "Hogarthian" currently means so many different things, to so many different divers, that it basically doesn't mean anything specifically any longer, with the possible exception of the long hose and bungeed back-up. And god only knows what configuration, precisely, William Hogarth Main is actually diving these days, if Bill Main is even still diving. In lieu of any more substantive standards and criteria, "Hogarthian" basically means "near-DIR" or some DIR-like configuration that nevertheless does not meet the strict standards of the WKPP.
I hope this helps, and also hope that if there is any more recent and specific description of either configuration that may assist you to understand the differences, that someone will post a link.
Doc