I tasted this as part of my Bourbon Steward certification exam. Below are my (mostly unedited) notes from that tasting: Evan Williams Single Barrel Vintage (Barrel #677, barreled 2011-08-04, bottled 2019-04-30) Evan Williams Single Barrel Vintage (Barrel #678, barreled 2011-08-04, bottled 2019-04-30) Evan Williams Single Barrel Vintage from a Heaven Hill taster pack (unknown barrel, unknown barrel date, unknown bottle date) While shopping for samples for this exam, I was in the local Wake County ABC store (Raleigh NC) where they have lighted shelves for the bourbon section, and I asked myself, "Why is this bottle of Evan Wiliams lighter than that bottle?" When I realized they were drawn on the same day from different barrels, I was immediately curious to see how the two bottlings would compare to each other, as well as how they would compare to the 100ml sample from a Heaven Hill taster pack I found in Chattanooga TN the week before! Barrel 677 and 678 were barreled 2011-08-04 and bottled 2019-04-30, aged 7 years and 9 months. The taster pack sample is assumed to have been aged a similar amount of time. The label claims 86.6 proof, but I sensed some variation (see below). On the nose: caramel, indistinct fruit, perhaps cocoa? 678 seems bolder. The taster pack sample from the unknown barrel seems blander than 678 but stronger than 677. On the tongue: 677 has buttery feel, and tastes of caramel and toffee. 678 not as buttery, but has similar flavors and seems like it is higher proof. (A quick comparison of legs in these Glencairn whiskey tasting glasses seems to indicate less leg with 677 than 678 and the unknown barrel.) Unknown barrel seems to taste of salted peanuts, maybe? Seems the fieriest of the three. Returning to 677, it's definitely the tamest of the three. On the eyes: Barrel 678 is visually slightly darker in color. It and the unknown barrel appear to have more leg and are definitely higher proof than 677. On the tongue with filtered water added to each: 677 is really laid back. Now I taste the expected vanilla in addition to caramel. I can't pick out individual fruit flavors but it's generally in the background, along with salted peanuts again. 678 is definitely higher proof; with the same amount of water added, it seems to be stronger than 677 before I added water to it. It's similar for the unknown barrel, but it seems to have a proof lower than 678 but higher than 677 (I retract my earlier "fieriest of the three" comment). Now I'm tasting a some citrus, chiefly lemon, on the mid-tongue as I swirl 678. Summary: As expected, although all three are labeled identically, there are differences, mostly subtle. The usual bouquet and flavors are there: caramel, vanilla and indistinct fruitiness. 677 has elusive hints of cocoa or chocolate but hard to pin down. 678 is bolder, with stronger and more-varied flavors, especially some citrus-y notes like lemon. The taster pack sample from an unknown barrel and date seems to mimic 678 much more than 677. And lastly, Barrel 678 seems to be higher proof than Barrel 677, with the unknown barrel somewhere between them (but closer in proof to 678). As I expected, this tasting shows that all three are mostly similar in taste but subtle differences exist. The obvious difference in proof was a surprise, but in hindsight I should have expected it. If I had to choose among the three the next time I bought a bottle a bottle of Evan Wiliams Single Barrel Select, I'd hope for something most like Barrel 678.