Ive not fished in a overnighter, but have had a couple Adventures.  Basic differences are the SeaV2 hull after 92? cant remember the year.  Rounded windshield frames after 97 or so, no  fake a teak for cabin trim, redesigned cuddy doors after 98 or so.  Gradywhite.com has a really good year by year changes for each model, good reading.  Im sure more minor changes.
Jim