I smoke both and although neither is a "go to" smoke, both are frequently enjoyed. I find Blockage Runner to be a traditional Navy Flake ( sweet and light) while Black Frigate to more closely resemble a very mild English. Black Frigate seems to have a bit more complexity and less sweetness than Blockade Runner. I suspect they share the same base elements, each offering a slightly different flavor profile to that base, depending on your mood. I enjoy both often. C&D does do some wonderful things with our beloved leaf and these two are a splendid example, taking a traditional preparation and giving it interesting variation.