Have not read the whole thread so I might come late to the party...
If I memorize correctly from the 1 50 gram tin I had, HHBF is more a chocolately blend, I thought of it higher than ABF which to me had to be bone dry to truly enjoy. I second HU Dockworker as a nice burley blend, but to me they are totally different with the oriental spice and florality I get from it. Nevertheless a very good blend, but not a substitution if you look for a HHBF "match", personally I would smoke Dockworker above any other Burley.