From that website and our warehouse options:
Warehouse K is best described as bringing both powerful spice notes and antique oak notes. While most people may point to cherries being the most common fruit coming from warehouse K barrels, I would disagree. Many K barrels have underlying tropical (fruit) flavors like coconuts, strawberries and bananas. And while I know that strawberries aren't necessarily a tropical fruit, for some reason they get lumped into that description in my mind. Warehouse K barrels can also take the shape of a very rye-forward profile bringing lots of spice, mint and herbal notes. These are primarily concentrated in the higher floors (4+). Warehouse K barrels are more unpredictable than most other warehouses overall.
Warehouse L, like Warehouse K, has barrels that embrace a spicy nature. Cinnamon will be most common but also there is an oak-spice that is very prevalent. Barrels tend to be very creamy and buttery with lots of vanilla. Sweetness comes from caramel and brown sugar while fruit notes center around cherries and stewed fruits. The oak and other tannins are middle-of-the-road compared to other warehouses never hiding and also never so tannic that it comes off as bitter. Warehouse L gives barrels that are always safe bets, but not necessarily the best at any one thing.
The oak notes on barrels coming from Warehouse H are much less impactful compared to I, J, K or L warehouses. This probably has something to do with Warehouse H having the lowest average proof of any of the 7 warehouses. However, since the barrels within are rumored to have aged for a longer period of time, a varnish note is more likely to be encountered. This makes any bourbon from here taste a bit more refined and mellow than the other warehouses. Expect to find honey sweetness, delicate cigar wrapper, butterscotch and raisin notes.