VA 309 is classed as Dark Air-Cured/Dark Fire-Cured. It produces very large, thick leaves. Most of the Dark Air/Fire varieties have fairly sticky leaves when growing (because of increased leaf trichomes). Cured either way, it's pretty hefty stuff, in terms of body and strength. Dark Air-Cured is a separate USDA class from cigar varieties, even though they are both dark, and both air-cured. [The naming conventions are kind of a mess, left over from the primary markets for various leaf from various growing areas of the US during the late 19th century. They are formally called "market classes".]
The only dark air-cured variety that I have grown is Little Yellow, and once kilned, there is no mistaking it for either cigar leaf or burley. It has a rich, warm and rounded aroma profile that is distinctive.
The dark air-cured tobacco offered by WLT (unspecified variety) can be used for pipe blending, and serves to remove tongue bite from Virginia flue-cured blends, while it ratchets up the nicotine. Dark air-cured leaf also can be made into a somewhat tamer Cavendish for blending.
Bob