"Classical roguelike" usually means "direct descendent of Hack/Angband/Larn/Moria" (Rogue itself produced very few descendents, I think). "Traditional" excludes several interesting categories which are uncontroversially roguelikes: games not part of the current 'body of practice' like Dungeon Hack; radically different PCG approaches like 868-HACK; and the Japanese design lineage in e.g. Shiren or Baroque which uses a very different approach to progression dynamics than today's roguelites.